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 A066097 #4 May 11 2007 03:00:00 %S A066097 2,7,10,15,20,23,28,31,36,41,44,49,54,57,62,65,70,75,78,83,86,91,96,99 %N A066097 Duplicate of A035336. %K A066097 dead %O A066097 0,1