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 A097264 #4 Feb 16 2025 08:32:54 %S A097264 2,2,4,4,6,2,4,2,2,8,12,6,6,6,8,4,4,4,6,14,6,12,12,14,10,2,2,2,12,12, %T A097264 16,14,6,6,6,20,8,16,4,8,4,8,18,6,18,6,8,12,24,8,22,14,2,14,2,10,24, %U A097264 12,24,4,4,18,30,18,2,6,2,20,4,16,16,8,8,18,18,6,18,2,6,24,12,32,4,24,12 %N A097264 Primitive Pythagorean Quadruples a^2+b^2+c^2=d^2, 0<a<=b<=c<=d, gcd(a,b,c,d)=1, sorted by d, then c, then b; sequence gives short even leg values. %C A097264 One of a,b,c is odd, other two are even for primitive Pythagorean quadruples. %H A097264 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PythagoreanQuadruple.html">Pythagorean Quadruple.</a> %Y A097264 Cf. A096907, A096908, A096909. %K A097264 nonn %O A097264 1,1 %A A097264 _Ray Chandler_, Aug 15 2004