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 A043361 #5 May 11 2007 03:00:00 %S A043361 3,8,13,15,16,17,19,23,28,33,38,40,41,42,44,48,53,58,63,65,66 %N A043361 Duplicate of A023734. %K A043361 dead %O A043361 1,1