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A080814
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Successive words in the formal D0L language that produces the Thue-Morse sequence A001285 (start with 1, map 1 -> 12, 2 -> 21).
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4
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OFFSET
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1,2
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REFERENCES
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A. Salomaa, Jewels of Formal Language Theory. Computer Science Press, Rockville, MD, 1981, p. 5.
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LINKS
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MATHEMATICA
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Map[FromDigits, SubstitutionSystem[{1->{1, 2}, 2->{2, 1}}, {1}, 7]] (* Paolo Xausa, Dec 24 2023 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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