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 A024613 #3 May 19 2006 03:00:00 %S A024613 7,13,19,21,28,31,37,39,43,49,52,57,61,63,67,73,76,79,84,91,93,97,103, %T A024613 109 %N A024613 Duplicate of A024606. %K A024613 dead %O A024613 1,1