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

0,1

Comments

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

Links

Table of n, a(n) for n=0..7.

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.

Sequence in context: A000180 A215715 A292437 * A192460 A004122 A359124

Adjacent sequences: A317193 A317194 A317195 * A317197 A317198 A317199

Keyword

nonn

Author

N. J. A. Sloane, Aug 05 2018

Status

approved