A320268 - cp's OEIS frontend

A320268 Number of unlabeled series-reduced rooted trees with n nodes where the non-leaf branches directly under any given node are all equal.

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	3
7	6
8	9
9	16
10	26
11	44
12	70
13	119
14	189
15	314
16	506
17	830
18	1336
19	2186
20	3522
21	5737
22	9266
23	15047
24	24313
25	39444
26	63759
27	103322
28	167098
29	270616
30	437714
31	708676
32	1146390
33	1855582
34	3002017
35	4858429
36	7860454
37	12720310
38	20580764
39	33303260
40	53884144
41	87190964

[1, 0, 1, 1, 2, 3, 6, 9, 16, 26, 44, 70, 119, 189, 314, 506, 830, 1336, 2186, 3522, 5737, 9266, 15047, 24313, 39444, 63759, 103322, 167098, 270616, 437714, 708676, 1146390, 1855582, 3002017, 4858429, 7860454, 12720310, 20580764, 33303260, 53884144, 87190964]

cp's OEIS Frontend

A320268 Number of unlabeled series-reduced rooted trees with n nodes where the non-leaf branches directly under any given node are all equal.

Table of values

List of values