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Successive strings in the construction of the Thue-Morse sequence A001285.
3

%I #14 Dec 24 2023 18:07:36

%S 1,2,21,2112,21121221,2112122112212112,

%T 21121221122121121221211221121221,

%U 2112122112212112122121122112122112212112211212212112122112212112

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

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

%F Drop first half of each word in A080814.

%t Join[{1},Map[FromDigits,SubstitutionSystem[{1->{1,2},2->{2,1}},{2},7]]] (* _Paolo Xausa_, Dec 24 2023 *)

%Y Cf. A080814.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Mar 26 2003

%E a(8) from _Paolo Xausa_, Dec 24 2023