A217938 Bidendriforms (see Foissy and Patras for precise definition).

1, 1, 2, 10, 70, 550, 4730, 44378, 45646

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: A121201 A166076 A354307 * A333902 A051405 A005568

Adjacent sequences: A217935 A217936 A217937 * A217939 A217940 A217941

Keyword

nonn

Author

N. J. A. Sloane, Oct 22 2012

Status

approved