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A106825
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Trajectory of 1 under the morphism 1->1222, 2->2111.
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0
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1, 2, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 2
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OFFSET
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0,2
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LINKS
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F. M. Dekking, Recurrent sets, Advances in Mathematics, vol. 44, no. 1 (1982), 78-104.
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MAPLE
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subs({1=[1, 2, 2, 2], 2=[2, 1, 1, 1]}, 1): subs({1=[1, 2, 2, 2], 2=[2, 1, 1, 1]}, %): subs({1=[1, 2, 2, 2], 2=[2, 1, 1, 1]}, %): subs({1=[1, 2, 2, 2], 2=[2, 1, 1, 1]}, %); # remove all brackets from the output; Emeric Deutsch, May 31 2005
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MATHEMATICA
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Nest[ Flatten[ # /. {1 -> {1, 2, 2, 2}, 2 -> {2, 1, 1, 1}}] &, {1}, 5] (* Robert G. Wilson v, Jun 20 2005 *)
SubstitutionSystem[{1->{1, 2, 2, 2}, 2->{2, 1, 1, 1}}, 1, 4]//Flatten (* Harvey P. Dale, Nov 20 2021 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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