OFFSET
1,2
COMMENTS
Since nonzero terms in the OEIS may not begin with 0, 1 has been added to all the digits.
LINKS
S. Giraudo, Combinatorial operads from monoids, arXiv preprint arXiv:1306.6938, 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 14 2013
STATUS
approved