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A036580 Ternary Thue-Morse sequence: closed under a->abc, b->ac, c->b. 4
0, 1, 2, 0, 2, 1, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 1, 2, 0, 2, 1, 0, 1, 2, 1, 0, 2, 0, 1, 2, 1, 0, 1, 2, 0, 2, 1, 0, 2, 0, 1, 2, 0, 2, 1, 0, 1, 2, 1, 0, 2, 0, 1, 2, 0, 2, 1, 0, 2, 0, 1, 2, 1, 0, 1, 2, 0, 2, 1, 0, 2, 0, 1, 2, 0, 2, 1, 0, 1, 2, 1, 0, 2, 0, 1, 2, 1, 0, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

0 is a, 1 is b and 2 is c. - Robert G. Wilson v, Jul 30 2018

REFERENCES

M. Lothaire, Combinatorics on Words. Addison-Wesley, Reading, MA, 1983, p. 26.

LINKS

Table of n, a(n) for n=0..98.

Michaël Rao, Michel Rigo, Pavel Salimov, Avoiding 2-binomial squares and cubes, arXiv:1310.4743 [cs.FL], 2013.

Michaël Rao, Michel Rigo, Pavel Salimov, Avoiding 2-binomial squares and cubes, Theoretical Computer Science, Volume 572, 23 March 2015, Pages 83-91.

MATHEMATICA

Nest[Flatten[# /. {0 -> {0, 1, 2}, 1 -> {0, 2}, 2 -> {1}}] &, {1}, 7] (* Robert G. Wilson v, Jul 30 2018 *)

CROSSREFS

A007413(n+1) - 1.

See A036577 for another version.

Sequence in context: A112300 A049239 A194305 * A101674 A100820 A038760

Adjacent sequences:  A036577 A036578 A036579 * A036581 A036582 A036583

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 17 05:26 EST 2019. Contains 319207 sequences. (Running on oeis4.)