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 A027223 #4 Mar 30 2012 18:56:14 %S A027223 1,2,11,34,183,630,3384,12192,65536,242232,1303758,4900880,26415708, %T A027223 100525392,542639986,2084879028,11271483340,43645729836,236329734438, %U A027223 921177944356 %N A027223 a(n) = self-convolution of row n of array T given by A026747. %K A027223 nonn %O A027223 0,2 %A A027223 _Clark Kimberling_