A036776 - cp's OEIS frontend

A036776 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 4 neighbors that are further away from the root than the node itself.

n	a(n)
0	0
1	1
2	2
3	9
4	64
5	625
6	7770
7	117390
8	2088520
9	42771960
10	991090800
11	25635767850
12	732235165200
13	22890759391500
14	777398836414200
15	28501053507927000
16	1121908690738836000
17	47194400446765572000
18	2112854517933207048000
19	100302903229033765260000
20	5032863920347902999360000

[0, 1, 2, 9, 64, 625, 7770, 117390, 2088520, 42771960, 991090800, 25635767850, 732235165200, 22890759391500, 777398836414200, 28501053507927000, 1121908690738836000, 47194400446765572000, 2112854517933207048000, 100302903229033765260000, 5032863920347902999360000]

cp's OEIS Frontend

A036776 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 4 neighbors that are further away from the root than the node itself.

Table of values

List of values