A317196 a(n) = concatenation of n-th stage of the trajectory of 2 under the tribonacci morphism 1 -> {1, 2}, 2 -> {1, 3}, 3 -> {1}.

2, 13, 121, 121312, 12131211213, 12131211213121213121, 1213121121312121312112131213121121312, 12131211213121213121121312131211213121213121121312112131212131211213

Offset: 0

Author

N. J. A. Sloane, Aug 05 2018

Keywords

• nonn

Comments

a(n) is the concatenation of A103269(n-1) and A103269(n-2) for n >= 2.

Links

• Bo Tan and Zhi-Ying Wen, Some properties of the Tribonacci sequence, European Journal of Combinatorics, 28 (2007) 1703-1719. See B_n.

Crossrefs

Cf. A103269.