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 A083649 #3 May 11 2007 03:00:00 %S A083649 1,1,2,9,1,2,8,5,9,9,7,0,6,2,6,6,3,5,4,0,4,0,7,2,8,2,5,9,0,5,9,5,6,0,0 %N A083649 Duplicate of A073009. %K A083649 dead %O A083649 0,3