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A277745 Trajectory of 1 under repeated application of the morphism 1 -> 1232, 2 -> 1232232, 3 -> 123232. 1
1, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This is A275925 put into Dekking's standard form.

LINKS

Table of n, a(n) for n=1..101.

F. Michel Dekking, Morphisms, Symbolic Sequences, and Their Standard Forms, Journal of Integer Sequences, Vol. 19 (2016), Article 16.1.1.

MAPLE

with(ListTools);

psi:=proc(S)

Flatten(subs( {1=[1, 2, 3, 2], 2=[1, 2, 3, 2, 2, 3, 2], 3=[1, 2, 3, 2, 3, 2]}, S));

end;

S:=[1];

for n from 1 to 4 do S:=psi(S): od:

S;

MATHEMATICA

SubstitutionSystem[{1 -> {1, 2, 3, 2}, 2 -> {1, 2, 3, 2, 2, 3, 2}, 3 -> {1, 2, 3, 2, 3, 2}}, {1}, 3] // Last (* Jean-Fran├žois Alcover, Jan 21 2018 *)

CROSSREFS

Cf. A275925, A276790.

Sequence in context: A324504 A032452 A084199 * A320858 A304111 A030314

Adjacent sequences:  A277742 A277743 A277744 * A277746 A277747 A277748

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 08 2016

STATUS

approved

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Last modified September 16 20:51 EDT 2021. Contains 347473 sequences. (Running on oeis4.)