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 A181513 #6 May 17 2016 07:58:35 %S A181513 1,2,5,19,81,436,2659 %N A181513 Row sums of A181512. %e A181513 a(4) = 1+3+3+6+6= 19. %Y A181513 Cf. A181511, A181512 %K A181513 nonn %O A181513 1,2 %A A181513 _Alford Arnold_, Oct 26 2010