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 A084333 #4 Feb 20 2005 03:00:00 %S A084333 2,3,5,11,7,17,29,13,31,23,37,59,19,43,71,41,61,97,53,79,47,89,127,67 %N A084333 Erroneous version of A084331. %K A084333 dead %O A084333 1,1