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A291797 Over the alphabet {1,2} let A=111, B=211; sequence lists words A, B, AA, AB, BA, BB, AAA, AAB, ... 5

%I

%S 111,211,111111,111211,211111,211211,111111111,111111211,111211111,

%T 111211211,211111111,211111211,211211111,211211211,111111111111,

%U 111111111111,111111111211,111111211111,111111211211,111211111111,111211111211

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

%H Peter R. J. Asveld, <a href="http://doc.utwente.nl/66184/1/1988m20.pdf">On a Post's System of Tag</a>. Bulletin of the EATCS 36 (1988), 96-102. See Table 3.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Sep 04 2017

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Last modified July 22 05:47 EDT 2019. Contains 325213 sequences. (Running on oeis4.)