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 A092606 #10 Oct 01 2016 20:53:31
%S A092606 0,2,1,0,0,0,2,1,0,2,1,0,2,1,0,0,0,2,1,0,0,0,2,1,0,0,0,2,1,0,2,1,0,2,
%T A092606 1,0,0,0,2,1,0,2,1,0,2,1,0,0,0,2,1,0,2,1,0,2,1,0,0,0,2,1,0,0,0,2,1,0,
%U A092606 0,0,2,1,0,2,1,0,2,1,0,0,0,2,1,0,0,0,2,1,0,0,0,2,1,0,2,1,0,2,1,0,0,0,2,1,0
%N A092606 Fixed point of the morphism 0 -> 021, 1 -> 0, 2 -> 0; starting with a(1) = 0.
%C A092606 To construct the sequence, start from the Feigenbaum sequence A035263 = 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, ..., then change 0 -> 2, 1 and 1 -> 0. - _Philippe Deléham_, Apr 12 2004
%H A092606 <a href="/index/Fi#FIXEDPOINTS">Index entries for sequences that are fixed points of mappings</a>
%F A092606 a(n) = 0 for n in A003156; a(n) = 1 for n in A003157; a(n) = 2 for n in A003158.
%t A092606 Nest[ Function[ l, {Flatten[(l /. {0 -> {0, 2, 1}, 1 -> {0}, 2 -> {0}})]}], {0}, 6] (* _Robert G. Wilson v_, Mar 03 2005 *)
%Y A092606 Cf. A003156, A003157, A003158.
%K A092606 easy,nonn
%O A092606 1,2
%A A092606 _Philippe Deléham_, Apr 11 2004