A291797 Over the alphabet {1,2} let A=111, B=211; sequence lists words A, B, AA, AB, BA, BB, AAA, AAB, ...

111, 211, 111111, 111211, 211111, 211211, 111111111, 111111211, 111211111, 111211211, 211111111, 211111211, 211211111, 211211211, 111111111111, 111111111111, 111111111211, 111111211111, 111111211211, 111211111111, 111211111211

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Peter R. J. Asveld, On a Post's System of Tag. Bulletin of the EATCS 36 (1988), 96-102. See Table 3.

Crossrefs

Sequence in context: A245364 A172189 A279777 * A088287 A082946 A082945

Adjacent sequences: A291794 A291795 A291796 * A291798 A291799 A291800

Keyword

nonn

Author

N. J. A. Sloane, Sep 04 2017

Status

approved