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 A123465 #6 Dec 04 2015 14:16:44 %S A123465 1,1,1,2,3,6,11,23,47,106 %N A123465 Duplicate of A000055. %K A123465 dead %O A123465 1,4