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 A089547 #9 Jan 25 2020 12:51:55 %S A089547 9,133,189,400,1036,57,820,1464,1513,2340,2461,2380,5289,973,5617, %T A089547 4444,3616,1309,5797,12921,5220,7540,17880,7240,4369,20760,12549, %U A089547 24420,11820,9724,22849,31621,15729,337,31144,17476,12720,37389,8901,41964,34977 %N A089547 Short leg of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse. %H A089547 Ray Chandler, <a href="/A089547/b089547.txt">Table of n, a(n) for n = 1..10000</a> %Y A089547 Cf. A088319, A088515, A088516, A088546, A089545-A089552, A089554-A089558. %K A089547 nonn %O A089547 1,1 %A A089547 _Ray Chandler_, Nov 16 2003