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 A119938 #2 Mar 31 2012 13:20:12 %S A119938 3,37,169,4549,4769,241481,989549,9072541,9206605,1127335045, %T A119938 1138492345,194006036305,195382096705,196577627041,790503882349, %U A119938 229526961468061,230480866420061,83512167402400421,83790259858145525 %N A119938 Row sums of triangle A119937. %F A119938 a(n)=sum( A119937(m,n),n=1..m-1), m>=2. %K A119938 nonn,easy %O A119938 2,1 %A A119938 _Wolfdieter Lang_, Jul 20 2006