A325208 - cp's OEIS frontend

A325208 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 9 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	1000000000
11	25937424590
12	743008369224
13	23298084997044
14	793714764270428
15	29192925433321650
16	1152921466989795360
17	48661189511753527280
18	2185911410555033096364
19	104127340753401006230046
20	5242879377215160617336400

[0, 1, 2, 9, 64, 625, 7776, 117649, 2097152, 43046721, 1000000000, 25937424590, 743008369224, 23298084997044, 793714764270428, 29192925433321650, 1152921466989795360, 48661189511753527280, 2185911410555033096364, 104127340753401006230046, 5242879377215160617336400]

cp's OEIS Frontend

A325208 a(n) is the number of labeled rooted trees on a set of size n where each node has at most 9 neighbors that are further away from the root than the node itself.

Table of values

List of values