OFFSET
1,8
COMMENTS
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
EXAMPLE
1 -> 110 -> 110110120 -> ...
MATHEMATICA
Nest[Flatten[# /. {0 -> {1, 2, 0}, 1 -> {1, 1, 0}, 2 -> {1, 0, 0}}] &, {0}, 9];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 02 2018
STATUS
approved