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 A086562 #4 May 11 2007 03:00:00 %S A086562 1,2,6,9,12,28,30,1811,1976,8384,53760,243875,639336,41381633, %T A086562 102621357 %N A086562 Duplicate of A083789. %K A086562 dead %O A086562 1,2