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A080814 Successive words in the formal D0L language that produces the Thue-Morse sequence A001285 (start with 1, map 1 -> 12, 2 -> 21). 4
1, 12, 1221, 12212112, 1221211221121221, 12212112211212212112122112212112, 1221211221121221211212211221211221121221122121121221211221121221 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
A. Salomaa, Jewels of Formal Language Theory. Computer Science Press, Rockville, MD, 1981, p. 5.
LINKS
Jarosław Grytczuk, Thue type problems for graphs, points and numbers, Discrete Math., 308 (2008), 4419-4429.
MATHEMATICA
Map[FromDigits, SubstitutionSystem[{1->{1, 2}, 2->{2, 1}}, {1}, 7]] (* Paolo Xausa, Dec 24 2023 *)
CROSSREFS
Cf. A001285 (which is the limiting word), A010060, A080815.
Sequence in context: A033564 A301474 A054351 * A340834 A078294 A317953
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 26 2003
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)