A289431 Sum of factorial-Catalan numbers over a certain family of decorations.

1, 2, 8, 40, 224, 1360, 8864, 61984, 467072

Offset

0,2

Comments

The precise definition involves the use of certain symbols akin to the peace symbol.

Links

Table of n, a(n) for n=0..8.

Vincent Pilaud, V. Pons, Permutrees, arXiv preprint arXiv:1606.09643 [math.CO], 2016.

Crossrefs

Cf. A289427, A289428, A289429, A289430.

Sequence in context: A052701 A151374 A177408 * A337912 A085485 A089603

Adjacent sequences: A289428 A289429 A289430 * A289432 A289433 A289434

Keyword

nonn,more

Author

N. J. A. Sloane, Jul 06 2017

Status

approved