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 A049379 #1 Dec 11 1999 03:00:00 %S A049379 1,1,1,2,6,20,99,646,5918 %N A049379 Erroneous version of A003094. %K A049379 dead %O A049379 0,4