A212258 Number of binary increasing trees with n nodes and "min-path" of length 4.
0, 0, 1, 6, 25, 105, 490, 2548, 14698, 93420, 649715, 4912776, 40154387, 352937312, 3320636540, 33305992320, 354819046132, 4001699525376, 47637151241125, 596958623741440, 7855611484697773, 108314507544748032, 1561635447992241230, 23498865431367684096
Offset: 2
Keywords
Links
- Filippo Disanto, André 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 [math.CO], 2012-2014.
Crossrefs
A diagonal of A186366.
Extensions
More terms from Alois P. Heinz, Apr 03 2014