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 A085006 #5 Mar 30 2012 18:39:18
%S A085006 1,1,2,1,1,1,1,1,2,1,1,2,1,1,2,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,2,1,
%T A085006 1,2,1,1,2,1,1,1,1,1,2,1,1,2,1,1,2,1,1,1,1,1,2,1,1,2,1,1,2,1,1,1,1,1,
%U A085006 2,1,1,1,1,1,2,1,1,1,1,1,2,1,1,2,1,1,2,1,1,1,1,1,2,1,1,1,1,1,2,1,1,1,1,1,2
%N A085006 Let S(0)={1,1,2} S(n)={S(n-1), S(n-1)-{x},{3-x}} where x is the last element of S(n-1), then sequence is S(infinity).
%C A085006 A fractal sequence.
%Y A085006 Cf. A085007, A085008, A085009.
%K A085006 nonn
%O A085006 1,3
%A A085006 _Benoit Cloitre_, Jun 17 2003