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 A115128 #3 Oct 12 2012 14:40:25 %S A115128 3,13,45,148,486,1618,5478,18841,65692,231713,825386,2964937,10728241, %T A115128 39065505,143047469,526399048,1945668327,7220164256,26889574045, %U A115128 100469991084,376513308113,1414840405426,5329942273203,20125253091226 %N A115128 Row sums of triangle A115127. %F A115128 a(n)=sum(A115127(n, m), m=1..), n>=1. %K A115128 nonn,easy %O A115128 2,1 %A A115128 _Wolfdieter Lang_, Jan 13 2006