A317199 Bo Tan et al.'s string E_n, defined by A_n = A103269(n) = D_{n-1}E_n = A317197(n-1)E_n for n >= 2, with E_1 = 12.

12, 213, 3121, 121312, 2131211213

Offset

1,1

Comments

See A317200 for length of E_n.

Links

Table of n, a(n) for n=1..5.

Bo Tan and Zhi-Ying Wen, Some properties of the Tribonacci sequence, European Journal of Combinatorics, 28 (2007) 1703-1719. See E_n, p. 1706.

Example

A_4 = 1213121121312, D_3 = 1213121, so E_4 = 121312.

Crossrefs

Cf. A103269, A317197, A317200.

See A317201 for the reversals of these words.

Sequence in context: A266910 A296681 A231260 * A281253 A184711 A262739

Adjacent sequences: A317196 A317197 A317198 * A317200 A317201 A317202

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 05 2018

Status

approved