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A217938 Bidendriforms (see Foissy and Patras for precise definition). 0
1, 1, 2, 10, 70, 550, 4730, 44378, 45646 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..9.

Loïc Foissy and Frédéric Patras, Natural endomorphisms of shuffle algebras, arXiv preprint arXiv:1205.2986, 2012

CROSSREFS

Sequence in context: A051575 A121201 A166076 * A333902 A051405 A005568

Adjacent sequences:  A217935 A217936 A217937 * A217939 A217940 A217941

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 22 2012

STATUS

approved

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Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)