A306274 Number of unlabeled balanced rooted semi-identity trees with 2n-1 nodes and depth n.

1, 1, 1, 2, 3, 5, 8, 14, 22, 36, 59, 96, 156, 253, 410, 666, 1078, 1744, 2824, 4569, 7386, 11942, 19302, 31188, 50380, 81376, 131403, 212166, 342492, 552811, 892148, 1439619, 2322709, 3747152, 6044436, 9749175, 15723022, 25355115, 40884174, 65918823, 106274262

Offset

1,4

Links

Alois P. Heinz, Table of n, a(n) for n = 1..400

Formula

a(n) = A306269(2n-1,n).

Crossrefs

Cf. A306269.

Sequence in context: A293553 A131132 A293545 * A282240 A004692 A094926

Adjacent sequences: A306271 A306272 A306273 * A306275 A306276 A306277

Keyword

nonn

Author

Alois P. Heinz, Feb 02 2019

Status

approved