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 A049322 #4 May 11 2007 03:00:00 %S A049322 0,0,0,0,0,0,2,4,8,12,20,28,40,52,70,88,112,136,168,200,240,280 %N A049322 Duplicate of A014557. %K A049322 dead %O A049322 0,7