|
|
A289430
|
|
Sum of factorial-Catalan numbers over a certain family of decorations.
|
|
4
|
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
The precise definition involves the use of certain symbols akin to the peace symbol.
|
|
LINKS
|
Vincent Pilaud, V. Pons, Permutrees, arXiv preprint arXiv:1606.09643 [math.CO], 2016.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|