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

Author

N. J. A. Sloane, Aug 05 2018

Keywords

• nonn
• more

Comments

See A317200 for length of E_n.

Examples

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

Links

• 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.

Crossrefs

Cf. A103269, A317197, A317200.

See A317201 for the reversals of these words.