A080815 Successive strings in the construction of the Thue-Morse sequence A001285.

1, 2, 21, 2112, 21121221, 2112122112212112, 21121221122121121221211221121221, 2112122112212112122121122112122112212112211212212112122112212112

Offset

1,2

References

A. Salomaa, Jewels of Formal Language Theory. Computer Science Press, Rockville, MD, 1981, p. 6.

Links

Table of n, a(n) for n=1..8.

Formula

Drop first half of each word in A080814.

Mathematica

Join[{1}, Map[FromDigits, SubstitutionSystem[{1->{1, 2}, 2->{2, 1}}, {2}, 7]]] (* Paolo Xausa, Dec 24 2023 *)

Crossrefs

Cf. A080814.

Sequence in context: A050204 A368188 A022470 * A351580 A276654 A114846

Adjacent sequences: A080812 A080813 A080814 * A080816 A080817 A080818

Keyword

nonn

Author

N. J. A. Sloane, Mar 26 2003

Extensions

a(8) from Paolo Xausa, Dec 24 2023

Status

approved