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 A334590 #6 Feb 16 2025 08:34:00 %S A334590 1,1,2,2,1,2,2,4,2,3,1,2,4,2,7,2,4,3,5,3,1,2,7,3,1,2,5,4,9,2,9,8,6,2, %T A334590 6,2,3,5,13,2,7,3,2,9,2,12,9,1,9,8,3,1,7,13,8,13,3,1,4,7,10,20,1,3,16, %U A334590 2,2,1,2,4,8,13,3,1,3,7,3,19,3,15,15,13,6,1,6,21,22,6,2,15,12 %N A334590 Number of nonprimitive Heronian triangles with perimeter A334589(n). %H A334590 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HeronianTriangle.html">Heronian Triangle</a> %H A334590 Wikipedia, <a href="https://en.wikipedia.org/wiki/Heronian_triangle">Heronian triangle</a> %H A334590 Wikipedia, <a href="https://en.wikipedia.org/wiki/Integer_triangle">Integer Triangle</a> %e A334590 a(1) = 1; there is one nonprimitive Heronian triangle with a perimeter of A334589(1) = 24, which is [6,8,10]. %e A334590 a(2) = 1; there is one nonprimitive Heronian triangle with a perimeter of A334589(2) = 32, which is [10,10,12]. %Y A334590 Cf. A051518, A096468, A334589. %K A334590 nonn %O A334590 1,3 %A A334590 _Wesley Ivan Hurt_, May 06 2020