A325207 - cp's OEIS frontend

A325207 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 8 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	7776
7	117649
8	2097152
9	43046721
10	999999990
11	25937423490
12	743008289364
13	23298080054964
14	793714478374818
15	29192909282466930
16	1152920554828545360
17	48661137306426044400
18	2185908358103092063584
19	104127157513055758393026
20	5242868049702388548952080

[0, 1, 2, 9, 64, 625, 7776, 117649, 2097152, 43046721, 999999990, 25937423490, 743008289364, 23298080054964, 793714478374818, 29192909282466930, 1152920554828545360, 48661137306426044400, 2185908358103092063584, 104127157513055758393026, 5242868049702388548952080]

cp's OEIS Frontend

A325207 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 8 neighbors that are further away from the root than the node itself.

Table of values

List of values