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 A023559 #3 Mar 30 2012 18:55:52 %S A023559 0,1,2,3,6,9,14,18,25,32,39,51,57,72,85,94,108,124,142,153,176,193, %T A023559 205,229,249,271,296,315,336,364,386,408,444,468,491,526,561,583,617, %U A023559 663,681,717,745,782,831,862,894,924,968,1006,1050,1100,1138 %N A023559 Convolution of A023531 and (1, p(1), p(2), ...). %K A023559 nonn %O A023559 1,3 %A A023559 _Clark Kimberling_