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 A089551 #9 Jan 25 2020 12:53:14 %S A089551 4,42,70,136,322,28,310,588,612,846,966,994,1804,462,1968,1738,1552, %T A089551 630,2418,3796,2286,3094,5340,3220,2040,6780,5170,7854,5010,4378,8760, %U A089551 10506,6664,168,10948,7582,5784,13390,4186,14898,13528,17214,5890,16492,19180 %N A089551 Radius of inscribed circle within primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse. %H A089551 Ray Chandler, <a href="/A089551/b089551.txt">Table of n, a(n) for n = 1..10000</a> %Y A089551 Cf. A088319, A088515, A088516, A088546, A089545-A089552, A089554-A089558. %K A089551 nonn %O A089551 1,1 %A A089551 _Ray Chandler_, Nov 16 2003