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 A331671 #24 Feb 26 2020 10:33:56 %S A331671 0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,1,0,0,1,0,0,1, %T A331671 1,0,0,0,0,0,1,1,0,0,0,1,1,0,2,0,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,0,0,1, %U A331671 1,1,1,0,1,0,0,0,1,0,1,0,0,1,0,1,1,0,0,0,1,0,1,1,1,1,0,0,1,2,0,0,0,1 %N A331671 Number of Pythagorean triangles with sum of legs n. %H A331671 Ray Chandler, <a href="/A331671/b331671.txt">Table of n, a(n) for n = 1..10000</a> %Y A331671 Cf. A118905, A198390, A254064. %K A331671 nonn %O A331671 1,49 %A A331671 _Ray Chandler_, Feb 26 2020