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 A084811 #9 May 27 2015 06:48:34 %S A084811 0,1,2,3,4,6,76 %N A084811 Duplicate of A051856. %K A084811 dead %O A084811 1,3