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A231869 Elements of the planar rooted trees sub-operad PRT of TN generated by 01. 0
1, 12, 122, 123, 1222, 1223, 1232, 1233, 1234, 12222, 12223, 12232, 12233, 12234, 12322, 12323, 12332, 12333, 12334, 12342, 12343, 12344, 12345 (list; graph; refs; listen; history; text; internal format)
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 [math.CO], 2013-2015.
CROSSREFS
Sequence in context: A037487 A332603 A358615 * A038490 A329360 A037551
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 14 2013
STATUS
approved

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Last modified February 28 01:38 EST 2024. Contains 370379 sequences. (Running on oeis4.)