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 A094742 #2 Nov 10 2007 03:00:00 %S A094742 1,2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83 %N A094742 Duplicate of A008578. %K A094742 dead %O A094742 1,2