A289427 Sum of factorial-Catalan numbers over a certain family of decorations.

1, 4, 32, 320, 3584, 43264, 553472, 7441920, 104740864

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. A289428, A289429, A289430, A289431.

Sequence in context: A060174 A052704 A151403 * A090004 A357404 A371675

Adjacent sequences: A289424 A289425 A289426 * A289428 A289429 A289430

Keyword

nonn,more

Author

N. J. A. Sloane, Jul 06 2017

Status

approved