A090238 - cp's OEIS frontend

A090238 Triangle T(n, k) read by rows. T(n, k) is the number of lists of k unlabeled permutations whose total length is n.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	6
8	4
9	1
10	0
11	24
12	16
13	6
14	1
15	0
16	120
17	72
18	30
19	8
20	1
21	0
22	720
23	372
24	152
25	48
26	10
27	1
28	0
29	5040
30	2208
31	828
32	272
33	70
34	12
35	1
36	0
37	40320
38	14976
39	4968
40	1576
41	440
42	96
43	14
44	1
45	0
46	362880
47	115200
48	33192
49	9696
50	2720
51	664
52	126
53	16
54	1
55	0
56	3628800
57	996480
58	247968
59	64704
60	17312
61	4380
62	952
63	160
64	18
65	1

[1, 0, 1, 0, 2, 1, 0, 6, 4, 1, 0, 24, 16, 6, 1, 0, 120, 72, 30, 8, 1, 0, 720, 372, 152, 48, 10, 1, 0, 5040, 2208, 828, 272, 70, 12, 1, 0, 40320, 14976, 4968, 1576, 440, 96, 14, 1, 0, 362880, 115200, 33192, 9696, 2720, 664, 126, 16, 1, 0, 3628800, 996480, 247968, 64704, 17312, 4380, 952, 160, 18, 1]

cp's OEIS Frontend

A090238 Triangle T(n, k) read by rows. T(n, k) is the number of lists of k unlabeled permutations whose total length is n.

Table of values

List of values