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 A023656 #3 Mar 30 2012 18:55:53 %S A023656 0,1,3,5,9,16,27,45,74,120,195,317,514,833,1349,2184,3535,5721,9258, %T A023656 14980,24239,39221,63462,102685,166149,268836,434987,703825,1138814, %U A023656 1842641,2981457,4824100,7805559 %N A023656 Convolution of (F(2), F(3), F(4), ...) and A014306. %K A023656 nonn %O A023656 1,3 %A A023656 _Clark Kimberling_