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 A074024 #4 May 11 2007 03:00:00 %S A074024 1,0,5,12,51,160,585,2016,7280,26112,95325,349180,1290555,4792320 %N A074024 Duplicate of A054661. %K A074024 dead %O A074024 1,3