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 A051898 #1 May 08 2000 03:00:00 %S A051898 1,1,1,1,1,2,3,4,4,5,6 %N A051898 Erroneous version of A002095. %K A051898 dead %O A051898 1,6