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 A067839 #3 Jan 24 2006 03:00:00 %S A067839 2,4,7,9,12,14,17,19,22,24,27,29,32,34,37,39,42,44,47,49,52,54,57,59 %N A067839 Duplicate of A047211. %K A067839 dead %O A067839 1,1