A145877 - cp's OEIS frontend

A145877 Triangle read by rows: T(n,k) is the number of permutations of [n] for which the shortest cycle length is k (1<=k<=n).

n	a(n)
1	1
2	1
3	1
4	4
5	0
6	2
7	15
8	3
9	0
10	6
11	76
12	20
13	0
14	0
15	24
16	455
17	105
18	40
19	0
20	0
21	120
22	3186
23	714
24	420
25	0
26	0
27	0
28	720
29	25487
30	5845
31	2688
32	1260
33	0
34	0
35	0
36	5040
37	229384
38	52632
39	22400
40	18144
41	0
42	0
43	0
44	0
45	40320
46	2293839
47	525105
48	223200
49	151200
50	72576
51	0
52	0
53	0
54	0
55	362880
56	25232230

[1, 1, 1, 4, 0, 2, 15, 3, 0, 6, 76, 20, 0, 0, 24, 455, 105, 40, 0, 0, 120, 3186, 714, 420, 0, 0, 0, 720, 25487, 5845, 2688, 1260, 0, 0, 0, 5040, 229384, 52632, 22400, 18144, 0, 0, 0, 0, 40320, 2293839, 525105, 223200, 151200, 72576, 0, 0, 0, 0, 362880, 25232230]

cp's OEIS Frontend

A145877 Triangle read by rows: T(n,k) is the number of permutations of [n] for which the shortest cycle length is k (1<=k<=n).

Table of values

List of values