A227809 Number of rooted identity trees with n nodes and exactly 5 subtrees from the root.

1, 6, 18, 57, 165, 460, 1242, 3295, 8589, 22169, 56675, 143941, 363527, 914253, 2291088, 5725579, 14275461, 35526939, 88279211, 219088566, 543169235, 1345516437, 3330785029, 8240718421, 20379364252, 50380569630, 124513186628, 307663311638, 760095010218

Offset

15,2

Links

Alois P. Heinz, Table of n, a(n) for n = 15..800

Example

: n=15     o        :
:       / /|\ \     :
:      / ( | ) \    :
:     o  o o o  o   :
:    /|  | | |      :
:   o o  o o o      :
:   |    | |        :
:   o    o o        :
:        |          :
:        o          :

Crossrefs

Column k=5 of A227774.

Sequence in context: A075386 A056343 A363517 * A119106 A223468 A223211

Adjacent sequences: A227806 A227807 A227808 * A227810 A227811 A227812

Keyword

nonn

Author

Alois P. Heinz, Jul 31 2013

Status

approved