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 A115187 #2 Oct 12 2012 14:40:25 %S A115187 1,5,39,346,3230,31191,309175,3129194,32211432,336239668,3551081432, %T A115187 37876866618,407453687104,4415521127579,48159808659879, %U A115187 528270329593474,5823991858003544,64497989461609224,717191431082458804 %N A115187 Row sums of triangle A115154 (called Y(3,1)). %F A115187 a(n)= sum(A115154(n,m),m=1..n+1), n>=0. %K A115187 nonn,easy %O A115187 0,2 %A A115187 _Wolfdieter Lang_, Feb 23 2006