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 A084619 #3 Nov 10 2007 03:00:00 %S A084619 0,1,2,7,11,19,27,38,50,64,80,98,118 %N A084619 Duplicate of A023393. %K A084619 dead %O A084619 1,3