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 A023562 #3 Mar 30 2012 18:55:52 %S A023562 0,1,3,5,8,12,16,20,25,31,37,43,49,56,64,72,80,88,96,105,115,125,135, %T A023562 145,155,165,176,188,200,212,224,236,248,260,273,287,301,315,329,343, %U A023562 357,371,385,400,416,432,448,464,480,496,512,528,544,561 %N A023562 Convolution of A023531 and odd numbers. %K A023562 nonn %O A023562 1,3 %A A023562 _Clark Kimberling_