A105819 - cp's OEIS frontend

A105819 Triangle of the numbers of different forests of m rooted trees of smallest order 2, i.e., without isolated vertices, on N labeled nodes.

n	a(n)
1	0
2	2
3	0
4	9
5	0
6	0
7	64
8	12
9	0
10	0
11	625
12	180
13	0
14	0
15	0
16	7776
17	2730
18	120
19	0
20	0
21	0
22	117649
23	46410
24	3780
25	0
26	0
27	0
28	0
29	2097152
30	893816
31	99120
32	1680
33	0
34	0
35	0
36	0
37	43046721
38	19389384
39	2600640
40	90720
41	0
42	0
43	0
44	0
45	0
46	1000000000
47	469532790
48	71734320
49	3654000
50	30240
51	0

[0, 2, 0, 9, 0, 0, 64, 12, 0, 0, 625, 180, 0, 0, 0, 7776, 2730, 120, 0, 0, 0, 117649, 46410, 3780, 0, 0, 0, 0, 2097152, 893816, 99120, 1680, 0, 0, 0, 0, 43046721, 19389384, 2600640, 90720, 0, 0, 0, 0, 0, 1000000000, 469532790, 71734320, 3654000, 30240, 0]

cp's OEIS Frontend

A105819 Triangle of the numbers of different forests of m rooted trees of smallest order 2, i.e., without isolated vertices, on N labeled nodes.

Table of values

List of values