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 A084753 #2 Feb 20 2005 03:00:00 %S A084753 1,3,5,2,4,7,9,11,13,17,6,8,12,14,16,19,23,29,31,37,41 %N A084753 Erroneous version of A081964. %K A084753 dead %O A084753 1,2