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 A092087 #3 Oct 12 2012 14:40:20 %S A092087 1,20,505,14090,415654,12706406,398165665,12706132610,411175121230, %T A092087 13453601230544,444162996339226,14772945441872060,494426375286105640, %U A092087 16635957551869533770,562327513989662942929,19084061209362462745826 %N A092087 Alternating row sums of triangle A092083 (s2(7)). %F A092087 a(n)= -sum(A092083(n, m)*(-1)^m, m=1..n), n>=1. %F A092087 G.f.: (-1 +(1-36*x)^(-1/6))/(5+(1-36*x)^(-1/6)). %K A092087 nonn,easy %O A092087 0,2 %A A092087 _Wolfdieter Lang_, Mar 19 2004