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 A046743 #1 Dec 11 1999 03:00:00 %S A046743 1,0,3,22,192,2070,24943 %N A046743 Erroneous version of A001393. %K A046743 dead %O A046743 0,3