A318899 - cp's OEIS frontend

A318899 Number of n-node rooted trees in which three 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)
3	1
4	1
5	3
6	7
7	18
8	45
9	116
10	298
11	776
12	2025
13	5322
14	14030
15	37155
16	98685
17	262961
18	702497
19	1881475
20	5050140
21	13583622
22	36605565
23	98821445
24	267220361
25	723704046
26	1962830775
27	5330900916
28	14497096134
29	39472561082
30	107601053713
31	293643574776
32	802203904616
33	2193758306687

[1, 1, 3, 7, 18, 45, 116, 298, 776, 2025, 5322, 14030, 37155, 98685, 262961, 702497, 1881475, 5050140, 13583622, 36605565, 98821445, 267220361, 723704046, 1962830775, 5330900916, 14497096134, 39472561082, 107601053713, 293643574776, 802203904616, 2193758306687]

cp's OEIS Frontend

A318899 Number of n-node rooted trees in which three 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