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

Author

N. J. A. Sloane, Sep 04 2017

Keywords

• nonn

Links

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