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A211602 Number of binary increasing trees with n nodes and "min-path" of length 3. 3
0, 1, 3, 7, 20, 70, 287, 1356, 7248 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

LINKS

Table of n, a(n) for n=2..10.

Filippo Disanto, Andre' permutations of the second kind associated to strictly binary increasing trees and left to right minima in their sub-permutations, arXiv preprint arXiv:1202.1139, 2012

CROSSREFS

A diagonal of A186366.

Sequence in context: A292503 A071688 A232687 * A110149 A024331 A007174

Adjacent sequences:  A211599 A211600 A211601 * A211603 A211604 A211605

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 11 2012

STATUS

approved

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Last modified August 7 12:19 EDT 2020. Contains 336276 sequences. (Running on oeis4.)