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 A023611 #3 Mar 30 2012 18:55:53 %S A023611 1,4,9,19,36,64,111,187,312,515,844,1378,2243,3643,5910,9578,15515, %T A023611 25122,40667,65821,106521,172377,278935,451350,730325,1181717,1912085, %U A023611 3093847,5005978,8099873 %N A023611 Convolution of Fibonacci numbers and A000201. %K A023611 nonn %O A023611 0,2 %A A023611 _Clark Kimberling_