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 A097901 #6 Jan 09 2009 03:00:00 %S A097901 3,4,5,6,7,8,10,11,13,14,17,19,22,23,26,27,29,31,34,37,38,41,43,45,46 %N A097901 Duplicate of A026427. %K A097901 dead %O A097901 1,1