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 A023546 #3 Mar 30 2012 18:55:52 %S A023546 0,2,3,4,7,9,11,13,17,20,23,26,29,34,38,42,46,50,54,60,65,70,75,80,85, %T A023546 90,97,103,109,115,121,127,133,139,147,154,161,168,175,182,189,196, %U A023546 203,212,220,228,236,244,252,260,268,276,284,294,303,312,321 %N A023546 Convolution of natural numbers >= 2 and A023531. %K A023546 nonn %O A023546 1,2 %A A023546 _Clark Kimberling_