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Fixed point of the morphism 1->{1,2}, 2->{1,3}, 3->{1}.
0

%I #7 Dec 07 2019 01:30:37

%S 1,2,1,3,1,2,1,1,2,1,3,1,2,1,2,1,3,1,2,1,1,2,1,3,1,2,1,3,1,2,1,1,2,1,

%T 3,1,2,1,2,1,3,1,2,1,1,2,1,3,1,2,1,1,2,1,3,1,2,1,2,1,3,1,2,1,1,2,1,3,

%U 1,2,1,3,1,2,1,1,2,1,3,1,2,1,2,1,3,1,2,1,1,2,1,3,1,2,1,2,1,3,1,2,1,1,2,1,3

%N Fixed point of the morphism 1->{1,2}, 2->{1,3}, 3->{1}.

%t Nest[Flatten[Join[ #, # /. {1 -> {1, 2}, 2 -> {1, 3}}]] &, {1}, 5] // Flatten

%Y Cf. A103684.

%K nonn

%O 1,2

%A _Robert G. Wilson v_, Jul 27 2006

%E Name and data corrected by _Michel Dekking_, Dec 02 2019