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 A047759 #3 May 11 2007 03:00:00 %S A047759 0,0,0,1,8,42,232,1277,7183,41041,238315,1402076,8343804,50136483 %N A047759 Duplicate of A047772. %K A047759 dead %O A047759 0,5