A200091 - cp's OEIS frontend

A200091 The number of ways of putting n labeled items into k labeled boxes so that each box receives at least 2 objects.

n	a(n)
2	1
3	1
4	1
5	6
6	1
7	20
8	1
9	50
10	90
11	1
12	112
13	630
14	1
15	238
16	2940
17	2520
18	1
19	492
20	11508
21	30240
22	1
23	1002
24	40950
25	226800
26	113400
27	1
28	2024
29	137610
30	1367520
31	2079000
32	1
33	4070
34	445896
35	7271880
36	22869000
37	7484400
38	1
39	8164
40	1410552
41	35692800
42	196396200
43	194594400
44	1
45	16354

[1, 1, 1, 6, 1, 20, 1, 50, 90, 1, 112, 630, 1, 238, 2940, 2520, 1, 492, 11508, 30240, 1, 1002, 40950, 226800, 113400, 1, 2024, 137610, 1367520, 2079000, 1, 4070, 445896, 7271880, 22869000, 7484400, 1, 8164, 1410552, 35692800, 196396200, 194594400, 1, 16354]

cp's OEIS Frontend

A200091 The number of ways of putting n labeled items into k labeled boxes so that each box receives at least 2 objects.

Table of values

List of values