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 A084946 #3 May 11 2007 03:00:00 %S A084946 1,2,14,168,2856,62832,1696464,54286848,2008613376,84361761792 %N A084946 Duplicate of A047055. %K A084946 dead %O A084946 0,2