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 A034805 #1 Dec 11 1999 03:00:00 %S A034805 1,0,1,1,2,2,6,9,20,37,86,183,419 %N A034805 Erroneous version of A000022. %K A034805 dead %O A034805 1,5