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A306274
Number of unlabeled balanced rooted semi-identity trees with 2n-1 nodes and depth n.
2
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
FORMULA
a(n) = A306269(2n-1,n).
CROSSREFS
Cf. A306269.
Sequence in context: A293553 A131132 A293545 * A282240 A004692 A094926
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 02 2019
STATUS
approved