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 A069587 #4 May 11 2007 03:00:00 %S A069587 2,3,7,5,41,7,11,17,13,11,47,13,17,23,19,17,53,19,23,29,37,23,59,73,29 %N A069587 Duplicate of A059843. %K A069587 dead %O A069587 0,1