This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A097755 #9 Feb 16 2025 08:32:54 %S A097755 1,2,3,4,6,8,9,12,16,18,21,24,27,32,36,42,48,54,63,64,72,81,84,96,108, %T A097755 126,128,144,162,168,189,192,216,231,243,252,256,288,324,336,378,384, %U A097755 432,441,462,486,504,512,567,576,648,672,693,729,756,768,864,882,924 %N A097755 Least integer "mod 4 prime signature" values that are the hypotenuse of no Pythagorean triples. %C A097755 See A097751 for definition of "mod 4 prime signature". %C A097755 Row 0 of table described in A097753; terms of A097752 with no prime factor of form 4k+1. %H A097755 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PythagoreanTriple.html">Pythagorean Triple.</a> %Y A097755 Cf. A097751, A097752, A097753, A097754, A097756. %K A097755 nonn %O A097755 1,2 %A A097755 _Ray Chandler_, Aug 26 2004 %E A097755 Correct offset. _Ray Chandler_, Jan 15 2013