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 A119950 #2 Mar 31 2012 13:20:12 %S A119950 1,8,45,160,1025,936,7693,22016,123201,181000,2190221,2409408, %T A119950 33932665,43909880,29887229,68917248,1244818081,732937032,14699459725, %U A119950 17464448672,14290498033,26212519432,630291945053 %N A119950 Row sums of (denominator) triangle A119948. %F A119950 a(n)=sum(A119948(n,m),m=1..n), n>=1. %K A119950 nonn,easy %O A119950 1,2 %A A119950 _Wolfdieter Lang_, Jul 20 2006