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 A024879 #3 Mar 30 2012 18:56:00 %S A024879 0,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,1,0,0,1,1,0,1,0,0,0,2,0,0,1,0,1,0,1, %T A024879 1,0,0,1,1,0,0,1,0,1,1,0,2,0,0,0,1,0,1,1,0,1,1,0,0,1,1,1,0,0,1,1,0,1, %U A024879 1,0,0,2,0,0,0,0,3,0,1,1,0,0,1,1,0,0,1,0,1,2,0,0,1,0,1,1,1,1,0,0,0,2,0,1,0,0,2,1,0,1,1 %N A024879 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A023531. %K A024879 nonn %O A024879 2,27 %A A024879 _Clark Kimberling_