A144258 - cp's OEIS frontend

A144258 Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows: T(n,k) is the number of forests of 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	1
5	0
6	8
7	6
8	3
9	0
10	16
11	24
12	27
13	16
14	0
15	32
16	80
17	150
18	190
19	125
20	0
21	64
22	240
23	660
24	1335
25	1830
26	1296
27	0
28	128
29	672
30	2520
31	7210
32	15435
33	22449
34	16807
35	0
36	256
37	1792
38	8736
39	33040
40	98105
41	219912
42	335160
43	262144
44	0
45	512
46	4608
47	28224
48	135072
49	521010
50	1600452
51	3727962
52	5902236
53	4782969
54	0

[1, 2, 0, 4, 1, 0, 8, 6, 3, 0, 16, 24, 27, 16, 0, 32, 80, 150, 190, 125, 0, 64, 240, 660, 1335, 1830, 1296, 0, 128, 672, 2520, 7210, 15435, 22449, 16807, 0, 256, 1792, 8736, 33040, 98105, 219912, 335160, 262144, 0, 512, 4608, 28224, 135072, 521010, 1600452, 3727962, 5902236, 4782969, 0]

cp's OEIS Frontend

A144258 Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows: T(n,k) is the number of forests of trees on n or fewer nodes using a subset of labels 1..n and k edges.

Table of values

List of values