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 A081104 #5 May 11 2007 03:00:00 %S A081104 1,5,24,112,512,2304,10240,45056,196608,851968,3670016,15728640 %N A081104 Duplicate of A079028. %K A081104 dead %O A081104 1,2