Domain > 112358-13.com

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Date	IP Address
2026-02-23	172.67.185.165 (ClassC)

HTTP/1.1 200 OKDate: Mon, 23 Feb 2026 11:28:38 GMTContent-Type: text/html; charsetutf-8Transfer-Encoding: chunkedConnection: keep-aliveAccess-Control-Allow-Origin: *Cache-Control: public, max-age0, must-revalidatecf-cache-status: DYNAMICreferrer-policy: strict-origin-when-cross-originx-content-type-options: nosniffReport-To: {group:cf-nel,max_age:604800,endpoints:{url:https://a.nel.cloudflare.com/report/v4?sFDf7PlMjSGheq4UrYURcEki6zKaDQGaqP5xCSjPZGCqNNhxBCV6OPuHEciUY4E9BMNOeCne2o%2B8FCh6nEdMEJWMpJcdPn1X3OSqVm9w%3D}}Nel: {report_to:cf-nel,success_fraction:0.0,max_age:604800}Server: cloudflareCF-RAY: 9d26617dec5f302c-PDXalt-svc: h3:443; ma86400

!DOCTYPE html>html langen>head>  meta charsetUTF-8 />  meta nameviewport contentwidthdevice-width, initial-scale1.0 />  !-- Primary SEO -->  title>Fibonacci Sequence Merch | 112358-13/title>  meta namedescription content112358-13 — a brand built on the Fibonacci sequence. Math-inspired apparel and accessories. 1, 1, 2, 3, 5, 8, 13. />  meta namekeywords contentfibonacci sequence, fibonacci merch, math apparel, golden ratio clothing, fibonacci hat, 1 1 2 3 5 8 13, math gifts, fibonacci gifts, sequence merch />  !-- Japanese meta (targets ja search results) -->  meta namedescription langja content112358-13 — フィボナッチ数列をテーマにしたブランド。数学にインスピレーションを受けたアパレルとアクセサリー。1, 1, 2, 3, 5, 8, 13。 />  meta namekeywords langja contentフィボナッチ数列, フィボナッチ グッズ, 数学 アパレル, 黄金比 ファッション, フィボナッチ 帽子, 数学 ギフト />  link relcanonical hrefhttps://112358-13.com/ />  !-- hreflang: signal language/region targeting to Google -->  link relalternate hreflangen hrefhttps://112358-13.com/ />  link relalternate hreflangja hrefhttps://112358-13.com/ />  link relalternate hreflangx-default hrefhttps://112358-13.com/ />  !-- Open Graph -->  meta propertyog:type contentwebsite />  meta propertyog:url contenthttps://112358-13.com/ />  meta propertyog:title contentFibonacci Sequence Merch | 112358-13 />  meta propertyog:description content112358-13 — a brand built on the Fibonacci sequence. Math-inspired apparel and accessories. />  meta propertyog:image contenthttps://112358-13.com/hat.webp />  meta propertyog:image:alt contentFibonacci sequence hat — 112358-13 />  meta propertyog:site_name content112358-13 />  !-- Twitter Card -->  meta nametwitter:card contentsummary_large_image />  meta nametwitter:title content112358-13 />  meta nametwitter:description contentA brand built on the Fibonacci sequence. />  meta nametwitter:image contenthttps://112358-13.com/hat.webp />  !-- Japanese Open Graph (for Japanese social sharing) -->  meta propertyog:locale:alternate contentja_JP />  !-- Structured Data: Organization -->  script typeapplication/ld+json>  {    @context: https://schema.org,    @type: Organization,    name: 112358-13,    url: https://112358-13.com/,    logo: https://112358-13.com/hat.webp,    description: A merch brand dedicated to the Fibonacci sequence, offering math-inspired apparel and accessories.,    description_ja: フィボナッチ数列をテーマにしたブランド。数学にインスピレーションを受けたアパレルとアクセサリー。  }  /script>  !-- Structured Data: Product (Japanese) -->  script typeapplication/ld+json>  {    @context: https://schema.org,    @type: Product,    name: フィボナッチ数列ハット,    image: https://112358-13.com/hat.webp,    description: フィボナッチ数列（1, 1, 2, 3, 5, 8, 13）をデザインしたハット。ひまわり、銀河、オウムガイの貝殻、人体の比率に現れるパターン。,    brand: { @type: Brand, name: 112358-13 },    offers: {      @type: Offer,      url: https://fibonacci-112358-13.myshopify.com/,      availability: https://schema.org/InStock,      priceCurrency: JPY,      seller: { @type: Organization, name: 112358-13 }    }  }  /script>  !-- Structured Data: WebSite -->  script typeapplication/ld+json>  {    @context: https://schema.org,    @type: WebSite,    name: 112358-13,    url: https://112358-13.com/  }  /script>  !-- Structured Data: Product -->  script typeapplication/ld+json>  {    @context: https://schema.org,    @type: Product,    name: Fibonacci Sequence Hat,    image: https://112358-13.com/hat.webp,    description: A hat featuring the Fibonacci sequence — 1, 1, 2, 3, 5, 8, 13. The pattern found in sunflowers, galaxies, nautilus shells, and the proportions of the human body.,    brand: { @type: Brand, name: 112358-13 },    offers: {      @type: Offer,      url: https://fibonacci-112358-13.myshopify.com/,      availability: https://schema.org/InStock,      priceCurrency: USD,      seller: { @type: Organization, name: 112358-13 }    }  }  /script>  link relpreconnect hrefhttps://fonts.googleapis.com />  link relpreconnect hrefhttps://fonts.gstatic.com crossorigin />  link hrefhttps://fonts.googleapis.com/css2?familyXanh+Mono:ital@0;1&familyNoto+Sans+JP:wght@300;400&displayswap relstylesheet />  style>    * { margin: 0; padding: 0; box-sizing: border-box; }    :root {      --bg: #0d0d0d;      --fg: #e8e4dc;      --dim: #555;      --line: #1f1f1f;    }    body {      background: var(--bg);      color: var(--fg);      font-family: Xanh Mono, monospace;      font-size: 14px;      line-height: 2;      letter-spacing: 0.04em;    }    a { color: inherit; text-decoration: none; }    /* Japanese text uses Noto Sans JP — Xanh Mono has no CJK glyphs */    langja, langja p, langja span {      font-family: Noto Sans JP, sans-serif;      font-weight: 300;      letter-spacing: 0.02em;    }    /* ── HEADER ── */    header {      display: flex;      align-items: baseline;      gap: 2ch;    }    .site-title {      font-size: 11px;      letter-spacing: 0.3em;      color: var(--dim);      text-transform: uppercase;    }    /* ── HERO ── */    .hero {    }    .sequence {      font-size: clamp(28px, 6vw, 56px);      letter-spacing: 0.25em;      color: var(--fg);      line-height: 1;      margin-bottom: 60px;    }    .hero-img {      display: block;      width: min(340px, 80vw);      margin: 0 auto;    }    .hero-img img {      width: 100%;      display: block;    }    /* ── DIVIDER ── */    hr {      border: none;      border-top: 1px solid var(--line);    }    /* ── TEXT BLOCKS ── */    .block {    }    .block-label {      font-size: 10px;      letter-spacing: 0.5em;      color: var(--dim);      text-transform: uppercase;      margin-bottom: 32px;      display: block;    }    .block p {      color: #777;      font-size: 13px;      line-height: 2.2;      margin-bottom: 1.4em;    }    .block p:last-child { margin-bottom: 0; }    strong {      color: var(--fg);      font-weight: normal;    }    /* ── NUMBER ROW ── */    .num-row {      display: flex;      flex-wrap: wrap;      gap: 1px;      margin: 40px 0 0;      background: var(--line);    }    .num-cell {      background: var(--bg);      padding: 20px 24px;      flex: 1;      min-width: 60px;    }    .num-cell .n {      display: block;      font-size: 22px;      color: var(--fg);      line-height: 1;      margin-bottom: 8px;    }    .num-cell .i {      display: block;      font-size: 9px;      letter-spacing: 0.3em;      color: var(--dim);    }    /* ── OCCURRENCES GRID ── */    .grid {      display: grid;      grid-template-columns: 1fr 1fr;      gap: 1px;      background: var(--line);      margin-top: 40px;    }    @media (max-width: 560px) {      .grid { grid-template-columns: 1fr; }    }    .grid-cell {      background: var(--bg);      padding: 28px 24px;    }    .grid-cell .g-label {      display: block;      font-size: 10px;      letter-spacing: 0.4em;      color: var(--dim);      text-transform: uppercase;      margin-bottom: 12px;    }    .grid-cell p {      font-size: 12px;      color: #555;      line-height: 2;      margin: 0;    }    /* ── PRODUCT ── */    .product-block {      display: grid;      grid-template-columns: 1fr 1fr;      align-items: start;    }    .product-block img {      width: 100%;      display: block;    }    .product-text p {      color: #777;      font-size: 13px;      line-height: 2.2;      margin-bottom: 1.4em;    }    .shop-link {      display: inline-block;      margin-top: 16px;      font-size: 10px;      letter-spacing: 0.5em;      text-transform: uppercase;      color: var(--dim);      border-bottom: 1px solid var(--line);      padding-bottom: 2px;      transition: color 0.2s, border-color 0.2s;    }    .shop-link:hover {      color: var(--fg);      border-color: #444;    }    /* ── FOOTER ── */    footer {      display: flex;      justify-content: space-between;      align-items: center;      flex-wrap: wrap;      gap: 1rem;    }    footer span, footer a {      font-size: 10px;      letter-spacing: 0.3em;      color: var(--dim);      text-transform: uppercase;      transition: color 0.2s;    }    footer a:hover { color: var(--fg); }    /* ── FLUID SPACING ── */    :root {      --pad: clamp(20px, 5vw, 60px);    }    header         { padding: clamp(30px, 5vw, 60px) var(--pad) 0; }    .hero          { padding: clamp(40px, 6vw, 80px) var(--pad) clamp(30px, 5vw, 60px); }    hr             { margin: 0 var(--pad); }    .block         { padding: clamp(36px, 5vw, 60px) var(--pad); }    .product-block { padding: clamp(36px, 5vw, 60px) var(--pad); gap: clamp(24px, 4vw, 60px); }    footer         { padding: clamp(24px, 4vw, 40px) var(--pad); }    /* ── MOBILE ── */    @media (max-width: 640px) {      header { flex-wrap: wrap; gap: 0.5ch; }      .num-cell { min-width: 44px; padding: 14px 12px; }      .num-cell .n { font-size: 18px; }      .grid { grid-template-columns: 1fr; }      .product-block { grid-template-columns: 1fr; }      .product-block img { max-width: 260px; margin: 0 auto; display: block; }      .block p { max-width: 100%; }    }    @media (max-width: 380px) {      .sequence { letter-spacing: 0.12em; }      .num-cell { min-width: 36px; padding: 10px 8px; }      .num-cell .n { font-size: 15px; }    }  /style>/head>body>  header>    span classsite-title>112358-13/span>    span classsite-title stylecolor: #222;>—/span>    span classsite-title>fibonacci sequence/span>  /header>  main>    section classhero>      div classsequence aria-labelThe Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13>        1  1  2  3  5  8  13      /div>      div classhero-img>        a hrefhttps://fibonacci-112358-13.myshopify.com/ aria-labelShop 112358-13 Fibonacci merch>          img srchat.webp alt112358-13 Fibonacci sequence hat width340 height340 loadingeager />        /a>      /div>    /section>    hr />    div classblock>      span classblock-label>the sequence/span>      p>        Begins with strong>1/strong> and strong>1/strong>. Each number after is the sum of the two before it. strong>1, 1, 2, 3, 5, 8, 13, 21, 34, 55…/strong> The pattern continues without end.      /p>      p>        First described formally by Leonardo of Pisa in 1202, though known to Indian mathematicians centuries earlier. The sequence is not a curiosity. It is a structure — one that recurs throughout the natural world with a consistency that suggests something fundamental about how growth itself works.      /p>      div classnum-row rolelist aria-labelFirst seven Fibonacci numbers>        div classnum-cell rolelistitem>span classn>1/span>span classi>n1/span>/div>        div classnum-cell rolelistitem>span classn>1/span>span classi>n2/span>/div>        div classnum-cell rolelistitem>span classn>2/span>span classi>n3/span>/div>        div classnum-cell rolelistitem>span classn>3/span>span classi>n4/span>/div>        div classnum-cell rolelistitem>span classn>5/span>span classi>n5/span>/div>        div classnum-cell rolelistitem>span classn>8/span>span classi>n6/span>/div>        div classnum-cell rolelistitem>span classn>13/span>span classi>n7/span>/div>      /div>    /div>    hr />    div classblock>      span classblock-label>φ/span>      p>        Divide any Fibonacci number by the one before it. As the numbers grow, the result converges on strong>1.6180339887…/strong> The golden ratio. φ.      /p>      p>        It appears in the Parthenon. In da Vincis studies of human proportion. In the spirals of galaxies. In the structure of DNA — 34 ångströms per cycle, 21 ångströms wide. Both Fibonacci numbers.      /p>    /div>    hr />    div classblock>      span classblock-label>occurrences/span>      p>The sequence appears in systems that have had no contact with each other across time./p>      div classgrid>        div classgrid-cell>          span classg-label>sunflower/span>          p>Seeds spiral in two directions — almost always consecutive Fibonacci numbers. 34 and 55. 55 and 89./p>        /div>        div classgrid-cell>          span classg-label>nautilus/span>          p>The shell grows as a logarithmic spiral. Its proportions approximate φ at every scale./p>        /div>        div classgrid-cell>          span classg-label>phyllotaxis/span>          p>Leaves on a stem arrange at 137.5° intervals — the golden angle — to maximize light exposure with minimum overlap./p>        /div>        div classgrid-cell>          span classg-label>architecture/span>          p>The Great Pyramid. The Parthenon. The UN Secretariat. Fibonacci proportions recur across human construction across centuries./p>        /div>        div classgrid-cell>          span classg-label>markets/span>          p>Fibonacci retracement levels — 23.6%, 38.2%, 61.8% — are among the most widely used tools in technical market analysis./p>        /div>        div classgrid-cell>          span classg-label>dna/span>          p>The double helix: 34 ångströms per cycle. 21 ångströms wide. Consecutive Fibonacci numbers. Ratio: φ./p>        /div>      /div>    /div>    hr />    div classproduct-block>      div>        a hrefhttps://fibonacci-112358-13.myshopify.com/ aria-labelShop the Fibonacci hat>          img srchat.webp alt112358-13 Fibonacci sequence hat — structured cap with numeric sequence design width400 height400 loadinglazy />        /a>      /div>      div classproduct-text>        span classblock-label>object no. 001/span>        p>strong>1  1  2  3  5  8  13./strong>/p>        p>More objects to follow./p>        a classshop-link hrefhttps://fibonacci-112358-13.myshopify.com/>shop →/a>      /div>    /div>    hr />    div classblock>      span classblock-label>112358-13/span>      p>        Call it what it is. strong>1 · 1 · 2 · 3 · 5 · 8 · 13./strong> Seven numbers that bite their own tail and keep going. The hyphen before 13 isnt decoration — its a warning. This thing does not stop. It never stopped. It was running long before Leonardo of Pisa gave it a name and it will be running long after every name is dust.      /p>      p>        We put it on a hat. Thats the joke and thats the truth.      /p>    /div>  /main>  hr />  !-- Japanese language section: indexed by Japanese search engines, screen-reader accessible -->  div langja stylepadding: var(--pad); border-top: none;>    span stylefont-size:10px; letter-spacing:0.5em; color:var(--dim); text-transform:uppercase; display:block; margin-bottom:24px;>日本語/span>    p stylecolor:#555; font-size:12px; line-height:2.4; margin-bottom:1em; font-family:Noto Sans JP, sans-serif; font-weight:300;>      フィボナッチ数列（フィボナッチすうれつ）は、1と1から始まり、直前の2つの数の和が次の数になる数列です。strong stylecolor:var(--fg); font-weight:normal;>1, 1, 2, 3, 5, 8, 13, 21, 34, 55…/strong>    /p>    p stylecolor:#555; font-size:12px; line-height:2.4; margin-bottom:1em; font-family:Noto Sans JP, sans-serif; font-weight:300;>      この数列はひまわりの種の配列、オウムガイの殻の螺旋、葉序（ようじょ）、建築、金融市場など、自然界と人間の文化のあらゆる場所に現れます。黄金比（φ  1.6180339887…）はフィボナッチ数列の比の収束値です。    /p>    p stylecolor:#555; font-size:12px; line-height:2.4; font-family:Noto Sans JP, sans-serif; font-weight:300;>      112358-13はフィボナッチ数列をテーマにしたブランドです。数学にインスピレーションを受けたアパレルとアクセサリーを販売しています。    /p>  /div>  hr />  footer>    span>© 2026 112358-13/span>    a hrefhttps://fibonacci-112358-13.myshopify.com/>shop/a>  /footer>!-- Cloudflare Pages Analytics -->script defer srchttps://static.cloudflareinsights.com/beacon.min.js data-cf-beacon{token: 1ae5238b53d649d780dd7101c1c5b375}>/script>!-- Cloudflare Pages Analytics -->/body>/html>

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