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 A047815 #3 Apr 09 2005 03:00:00 %S A047815 1,1,3,1,33,5,3 %N A047815 Erroneous version of A095844. %K A047815 dead %O A047815 0,3