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 A034183 #1 Dec 11 1999 03:00:00 %S A034183 1,0,1,3,8,48,383,6020 %N A034183 Erroneous version of A003216. %K A034183 dead %O A034183 1,4