A100526 - cp's OEIS frontend

A100526 Number of local binary search trees (i.e., labeled binary trees such that every left child has a smaller label than its parent and every right child has a larger label than its parent) with n vertices such that the root has only one child.

n	a(n)
1	1
2	2
3	6
4	28
5	180
6	1476
7	14728
8	173216
9	2346480
10	35981200
11	616111056
12	11652662880
13	241259095168
14	5427319729664
15	131818482923520
16	3437894427590656
17	95825936705566464
18	2842834581982211328
19	89435890422890433280
20	2974081497762693670400
21	104234511362034627442176

[1, 2, 6, 28, 180, 1476, 14728, 173216, 2346480, 35981200, 616111056, 11652662880, 241259095168, 5427319729664, 131818482923520, 3437894427590656, 95825936705566464, 2842834581982211328, 89435890422890433280, 2974081497762693670400, 104234511362034627442176]

cp's OEIS Frontend

A100526 Number of local binary search trees (i.e., labeled binary trees such that every left child has a smaller label than its parent and every right child has a larger label than its parent) with n vertices such that the root has only one child.

Table of values

List of values