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 A066677 #3 May 11 2007 03:00:00 %S A066677 1,3,7,5,11,7,29,15,19,11,23,13,53,29,31,17,103,19,191,25,43,23,47,35 %N A066677 Duplicate of A061026. %K A066677 dead %O A066677 1,2