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 A023616 #3 Mar 30 2012 18:55:53 %S A023616 1,0,2,2,1,4,3,4,4,6,5,6,9,6,9,8,10,12,11,10,13,14,13,16,15,16,16,20, %T A023616 17,18,21,20,23,22,23,24,23,24,28,28,27,28,31,28,31,32,31,36,33,34,35, %U A023616 38,38,38,39,38,41,42,41,42,45,46,47,46,45,48,49,48,52,52,51 %N A023616 Self-convolution of A023532. %K A023616 nonn %O A023616 1,3 %A A023616 _Clark Kimberling_