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 A023544 #3 Mar 30 2012 18:55:52 %S A023544 0,1,3,5,8,12,17,23,30,37,45,54,64,75,87,100,114,129,145,161,178,196, %T A023544 215,235,256,278,301,325,350,376,403,431,460,490,520,551,583,616,650, %U A023544 685,721,758,796,835,875,916,958,1001,1045,1090,1136,1183 %N A023544 Convolution of natural numbers with A014306. %K A023544 nonn %O A023544 1,3 %A A023544 _Clark Kimberling_