A144289 - cp's OEIS frontend

A144289 Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows: Number T(n,k) of forests of labeled rooted trees on n or fewer nodes using a subset of labels 1..n and k edges.

n	a(n)
0	1
1	2
2	0
3	4
4	2
5	0
6	8
7	12
8	9
9	0
10	16
11	48
12	84
13	64
14	0
15	32
16	160
17	480
18	820
19	625
20	0
21	64
22	480
23	2160
24	6120
25	10230
26	7776
27	0
28	128
29	1344
30	8400
31	34720
32	94500
33	155274
34	117649
35	0
36	256
37	3584
38	29568
39	165760
40	647920
41	1712592
42	2776200
43	2097152
44	0
45	512
46	9216
47	96768
48	701568
49	3669120
50	13783392
51	35630784
52	57138120
53	43046721
54	0

[1, 2, 0, 4, 2, 0, 8, 12, 9, 0, 16, 48, 84, 64, 0, 32, 160, 480, 820, 625, 0, 64, 480, 2160, 6120, 10230, 7776, 0, 128, 1344, 8400, 34720, 94500, 155274, 117649, 0, 256, 3584, 29568, 165760, 647920, 1712592, 2776200, 2097152, 0, 512, 9216, 96768, 701568, 3669120, 13783392, 35630784, 57138120, 43046721, 0]

cp's OEIS Frontend

A144289 Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows: Number T(n,k) of forests of labeled rooted trees on n or fewer nodes using a subset of labels 1..n and k edges.

Table of values

List of values