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 A098673 #3 May 11 2007 03:00:00 %S A098673 79,547,643,751,907,997,1201,1213,1237,1249,1483,1489,1627,1723,1747 %N A098673 Duplicate of A056211. %K A098673 dead %O A098673 1,1