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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Number Pattern 41 - Try It</title>
</head>
<body>
  <h1>Centered Square Number Pyramid</h1>
  <p>Edit the max width and click Run.</p>
  <pre id="output"></pre>

  <script>
    let m = 1;
    let result = "";
    const maxWidth = 9; // odd widths: 1,3,5,7,9

    for (let count = 1; count <= maxWidth; count += 2) {
      let line = "";
      for (let s = count; s < maxWidth; s++) {
        line += "    ";
      }
      for (let k = 1; k <= count; k++) {
        line += String(m * m).padStart(3, " ") + " ";
        m++;
      }
      result += line.trimEnd() + "\n";
    }

    document.getElementById("output").textContent = result;
  </script>
</body>
</html>

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JavaScript Number Pattern 41 (Try It)