OFFSET
0,2
COMMENTS
We call a Lyndon word (x[1],x[2],...,x[n]) smooth if abs(x[k]-x[k-1]) <= 1 for 2<=k<=n.
EXAMPLE
(See A215331).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Joerg Arndt, Aug 08 2012
EXTENSIONS
More terms from Joerg Arndt, Jun 17 2019
STATUS
approved