A318905 - cp's OEIS frontend

A318905 Number of n-node rooted trees in which nine equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root.

n	a(n)
9	1
10	1
11	3
12	8
13	22
14	60
15	167
16	465
17	1306
18	3680
19	10418
20	29582
21	84261
22	240581
23	688458
24	1973887
25	5669197
26	16307404
27	46973290
28	135474784
29	391164385
30	1130600056
31	3270921899
32	9471289877
33	27447106048
34	79598738454
35	231001452777
36	670812581033
37	1949157218646
38	5666759197092

[1, 1, 3, 8, 22, 60, 167, 465, 1306, 3680, 10418, 29582, 84261, 240581, 688458, 1973887, 5669197, 16307404, 46973290, 135474784, 391164385, 1130600056, 3270921899, 9471289877, 27447106048, 79598738454, 231001452777, 670812581033, 1949157218646, 5666759197092]

cp's OEIS Frontend

A318905 Number of n-node rooted trees in which nine equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root.

Table of values

List of values