OFFSET
1,2
LINKS
Lars Blomberg, Table of n, a(n) for n = 1..10000
Michel Rigo, Relations on words, arXiv preprint arXiv:1602.03364 [cs.FL], 2016. See Example 24.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 30 2016
EXTENSIONS
More terms from Lars Blomberg, Jan 12 2017
STATUS
approved