A219034 - cp's OEIS frontend

A219034 Triangular array read by rows: T(n,k) is the number of forests of rooted trees on n labeled nodes with exactly k isolated nodes; n>=0, 0<=k<=n.

n	a(n)
0	1
1	0
2	1
3	2
4	0
5	1
6	9
7	6
8	0
9	1
10	76
11	36
12	12
13	0
14	1
15	805
16	380
17	90
18	20
19	0
20	1
21	10626
22	4830
23	1140
24	180
25	30
26	0
27	1
28	167839
29	74382
30	16905
31	2660
32	315
33	42
34	0
35	1
36	3091768
37	1342712
38	297528
39	45080
40	5320
41	504
42	56
43	0
44	1
45	65127465
46	27825912
47	6042204
48	892584
49	101430
50	9576
51	756
52	72
53	0
54	1

[1, 0, 1, 2, 0, 1, 9, 6, 0, 1, 76, 36, 12, 0, 1, 805, 380, 90, 20, 0, 1, 10626, 4830, 1140, 180, 30, 0, 1, 167839, 74382, 16905, 2660, 315, 42, 0, 1, 3091768, 1342712, 297528, 45080, 5320, 504, 56, 0, 1, 65127465, 27825912, 6042204, 892584, 101430, 9576, 756, 72, 0, 1]

cp's OEIS Frontend

A219034 Triangular array read by rows: T(n,k) is the number of forests of rooted trees on n labeled nodes with exactly k isolated nodes; n>=0, 0<=k<=n.

Table of values

List of values