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 A104700 #14 May 20 2017 20:14:53 %S A104700 0,1,1,1,2,2,4,8,12,96,108,10368,10476,108615168,108625644 %N A104700 Duplicate of A039941. %K A104700 dead %O A104700 0,5