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 A079420 #4 May 11 2007 03:00:00 %S A079420 0,1,2,3,3,4,4,5,6,7,7,8,9,10,10,11,11,12,12,13,14,15,15,16,16,17,17, %T A079420 18 %N A079420 Duplicate of A076895. %K A079420 dead %O A079420 1,3