A348576 - cp's OEIS frontend

A348576 Triangle read by rows: T(n,k) is the number of ordered partitions of [n] into k nonempty subsets, in which the first subset has size at least 2, n >= 1 and 1 <= k <= n.

n	a(n)
1	0
2	1
3	0
4	1
5	3
6	0
7	1
8	10
9	12
10	0
11	1
12	25
13	80
14	60
15	0
16	1
17	56
18	360
19	660
20	360
21	0
22	1
23	119
24	1372
25	4620
26	5880
27	2520
28	0
29	1
30	246
31	4788
32	26376
33	58800
34	57120
35	20160
36	0
37	1
38	501
39	15864
40	134316
41	466704
42	771120
43	604800
44	181440
45	0
46	1
47	1012
48	50880
49	637020
50	3238200
51	8094240
52	10584000
53	6955200
54	1814400
55	0

[0, 1, 0, 1, 3, 0, 1, 10, 12, 0, 1, 25, 80, 60, 0, 1, 56, 360, 660, 360, 0, 1, 119, 1372, 4620, 5880, 2520, 0, 1, 246, 4788, 26376, 58800, 57120, 20160, 0, 1, 501, 15864, 134316, 466704, 771120, 604800, 181440, 0, 1, 1012, 50880, 637020, 3238200, 8094240, 10584000, 6955200, 1814400, 0]

cp's OEIS Frontend

A348576 Triangle read by rows: T(n,k) is the number of ordered partitions of [n] into k nonempty subsets, in which the first subset has size at least 2, n >= 1 and 1 <= k <= n.

Table of values

List of values