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 A070202 #23 Feb 16 2025 08:32:46 %S A070202 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0, %T A070202 0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,2,0,0,0,0, %U A070202 0,0,0,2,0,0,0,0,0,0,0,1,0,0,0,3,0,0,0,1,0,1 %N A070202 Number of integer triangles with perimeter n, integer inradius and side lengths that are not relatively prime. %H A070202 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Incircle.html">Incircle</a>. %H A070202 Reinhard Zumkeller, <a href="/A070080/a070080.txt">Integer-sided triangles</a> %e A070202 For perimeter 24, only the triangle with a=6, b=8, c=10 has an integer inradius (2), therefore a(24)=1. The next examples are a(32)=1 with a=10, b=10, c=12 and a(36)=1 with a=9, b=12, c=15. %Y A070202 Cf. A070138, A051493, A070109, A070209. %K A070202 nonn %O A070202 1,60 %A A070202 _Reinhard Zumkeller_, May 05 2002 %E A070202 Definition corrected by _Georg Fischer_, Apr 04 2024