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 A033169 #1 Dec 11 1999 03:00:00 %S A033169 1,0,0,2,14,94 %N A033169 Erroneous version of A002464. %K A033169 dead %O A033169 1,4