A229395 - cp's OEIS frontend

A229395 Number of shapes of balanced 10-ary trees with n nodes, where a tree is balanced if the total number of nodes in subtrees corresponding to the branches of any node differ by at most one.

n	a(n)
0	1
1	1
2	10
3	45
4	120
5	210
6	252
7	210
8	120
9	45
10	10
11	1
12	100
13	4500
14	120000
15	2100000
16	25200000
17	210000000
18	1200000000
19	4500000000
20	10000000000
21	10000000000
22	450000000000
23	9112500000000
24	109350000000000
25	861131250000000
26	4650108750000000
27	17437907812500000

[1, 1, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1, 100, 4500, 120000, 2100000, 25200000, 210000000, 1200000000, 4500000000, 10000000000, 10000000000, 450000000000, 9112500000000, 109350000000000, 861131250000000, 4650108750000000, 17437907812500000]

cp's OEIS Frontend

A229395 Number of shapes of balanced 10-ary trees with n nodes, where a tree is balanced if the total number of nodes in subtrees corresponding to the branches of any node differ by at most one.

Table of values

List of values