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 A095099 #9 Jun 10 2017 23:18:05 %S A095099 4,12,17,25,33,38,46,51,59,67,72,80,88,93,101,106,114,122,127,135,140 %N A095099 Duplicate of A134860. %K A095099 dead %O A095099 1,1