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 A070094 #6 Mar 30 2012 18:50:20 %S A070094 0,0,1,0,1,0,1,1,1,1,2,1,3,1,2,2,5,2,5,3,3,4,6,3,6,4,7,6,10,4,10,7,8, %T A070094 7,10,7,14,8,12,8,17,10,17,12,13,14,20,12,21,14,18,16,25,15,23,18,22, %U A070094 20,30,16,32,21,29,23,32,21,38,27,33,26,43,25 %N A070094 Number of acute integer triangles with perimeter n and relatively prime side lengths. %C A070094 a(n) = A051493(n) - A070102(n) - A070109(n). %H A070094 R. Zumkeller, <a href="/A070080/a070080.txt">Integer-sided triangles</a> %e A070094 For n=10 there are A005044(10) = 2 integer triangles: [2,4,4] and [3,3,4]; both are acute, but GCD(2,4,4)>1, therefore a(9) = 1. %Y A070094 Cf. A070080, A070081, A070082, A070093, A070096, A070099, A070084, A070119. %K A070094 nonn %O A070094 1,11 %A A070094 _Reinhard Zumkeller_, May 05 2002