OFFSET
1,2
COMMENTS
a(n) is a palindrome.
A027084 gives lengths of these words.
LINKS
Bo Tan and Zhi-Ying Wen, Some properties of the Tribonacci sequence, European Journal of Combinatorics, 28 (2007) 1703-1719. See D_n.
EXAMPLE
a(3) = 1213.12.1 = 1213121.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 05 2018
STATUS
approved