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 A088596 #2 May 11 2007 03:00:00 %S A088596 12,34,567,8,910,111213141516,17181920,2122232425262728,293031 %N A088596 Duplicate of A077293. %K A088596 dead %O A088596 1,1