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 A120097 #9 Feb 14 2020 11:16:25 %S A120097 4,12,15,24,21,40,35,60,45,56,84,63,55,80,112,77,72,144,99,91,140,180, %T A120097 117,105,132,176,220,143,120,168,264,165,153,156,208,260,312,195,187, %U A120097 171,252,308,364,221,209,240,420,255,247,231,224,288,352,416,480,285 %N A120097 Long leg of primitive Pythagorean triangle corresponding to hypotenuse A094194. %H A120097 Ray Chandler, <a href="/A120097/b120097.txt">Table of n, a(n) for n = 1..10000</a> %H A120097 F. Richman, <a href="http://math.fau.edu/Richman/mla/pythag3s.htm">Pythagorean Triples</a> %Y A120097 Cf. A120098. %K A120097 nonn %O A120097 1,1 %A A120097 _Lekraj Beedassy_, Jun 08 2006 %E A120097 Removed semicolon in URL - _R. J. Mathar_, Sep 23 2009