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 A071254 #4 May 11 2007 03:00:00 %S A071254 2,8,80,80,1215,16767,76544,636416,3995648,24151040,36315135,689278976 %N A071254 Duplicate of A063528. %K A071254 dead %O A071254 1,1