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 A038689 #5 May 11 2007 03:00:00 %S A038689 10,0,1,5,2,8,4,15,3,12,10,40,7,17,18,21,4,27,30,13,11,18,43,41,10,8 %N A038689 Duplicate of A030000. %K A038689 dead %O A038689 0,1