A187784 - cp's OEIS frontend

A187784 Triangular array read by rows: T(n,k) is the number of ordered set partitions of {1,2,...,n} with exactly k singletons, n>=0, 0<=k<=n.

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	2
6	1
7	6
8	0
9	6
10	7
11	8
12	36
13	0
14	24
15	21
16	100
17	60
18	240
19	0
20	120
21	141
22	372
23	1170
24	480
25	1800
26	0
27	720
28	743
29	3584
30	5166
31	13440
32	4200
33	15120
34	0
35	5040
36	5699
37	22864
38	67368
39	68544
40	159600
41	40320
42	141120
43	0
44	40320
45	42241
46	225684
47	502200
48	1161216
49	922320
50	1995840
51	423360
52	1451520
53	0
54	362880

[1, 0, 1, 1, 0, 2, 1, 6, 0, 6, 7, 8, 36, 0, 24, 21, 100, 60, 240, 0, 120, 141, 372, 1170, 480, 1800, 0, 720, 743, 3584, 5166, 13440, 4200, 15120, 0, 5040, 5699, 22864, 67368, 68544, 159600, 40320, 141120, 0, 40320, 42241, 225684, 502200, 1161216, 922320, 1995840, 423360, 1451520, 0, 362880]

cp's OEIS Frontend

A187784 Triangular array read by rows: T(n,k) is the number of ordered set partitions of {1,2,...,n} with exactly k singletons, n>=0, 0<=k<=n.

Table of values

List of values