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 A335013 #7 Feb 16 2025 08:34:00 %S A335013 8,10,12,15,25 %N A335013 Middle side lengths of equable Heronian triangles. %C A335013 Equable Heronian triangles are triangles with integer-sides, integer area and whose area is equal to their perimeter. There are exactly five, [6,8,10], [9,10,17], [5,12,13], [7,15,20], [6,25,29]. %H A335013 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HeronianTriangle.html">Heronian Triangle</a> %H A335013 Wikipedia, <a href="https://en.wikipedia.org/wiki/Heronian_triangle">Heronian triangle</a> %H A335013 Wikipedia, <a href="https://en.wikipedia.org/wiki/Integer_triangle">Integer Triangle</a> %Y A335013 Cf. A098030 (areas/perimeters), this sequence (middle side lengths), A335015 (smallest side lengths), A335016 (largest side lengths). %K A335013 nonn,fini,full %O A335013 1,1 %A A335013 _Wesley Ivan Hurt_, May 19 2020