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 A023654 #3 Mar 30 2012 18:55:53 %S A023654 2,9,23,49,95,172,300,510,853,1412,2319,3790,6174,10034,16283,26397, %T A023654 42765,69253,112114,181468,293688,475267,769072,1244461,2013660, %U A023654 3258254,5272052,8530449 %N A023654 Convolution of (F(2), F(3), F(4), ...) and A001950. %K A023654 nonn %O A023654 1,1 %A A023654 _Clark Kimberling_