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  <title>Automorphic range</title>
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  <h1>Automorphic numbers 1 to 50</h1>
  <p>Change <code>start</code> / <code>end</code> if you like, then <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){function n(n){if(n<=0)return!1;for(var t=n,r=BigInt(n)*BigInt(n);t>0;){if(t%10!==Number(r%BigInt(10)))return!1;t=t/10|0,r/=BigInt(10)}return!0}for(var t=[],r=1;r<=50;r++)n(r)&&t.push(String(r));document.getElementById("out").textContent="Automorphic numbers in the range 1 to 50\n"+t.join(" ")}()</script>
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JavaScript Automorphic — Range 1–50 peel (Try It)