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 A078785 #3 May 11 2007 03:00:00 %S A078785 4,6,8,12,20 %N A078785 Duplicate of A053016. %K A078785 dead %O A078785 0,1