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 A084650 #2 Jan 09 2009 03:00:00 %S A084650 2,2,3,11,14,27,28,66,212,231,552,2842,3774,6038,6784,10950,32948, %T A084650 78591 %N A084650 Duplicate of A067919. %K A084650 dead %O A084650 1,1