A350274 - cp's OEIS frontend

A350274 Triangle read by rows: T(n,k) is the number of n-permutations whose fourth-shortest cycle has length exactly k; n >= 0, 0 <= k <= max(0,n-3).

n	a(n)
0	1
1	1
2	2
3	6
4	23
5	1
6	109
7	1
8	10
9	619
10	16
11	45
12	40
13	4108
14	92
15	210
16	420
17	210
18	31240
19	771
20	1645
21	2800
22	2520
23	1344
24	268028
25	6883
26	17325
27	15960
28	26460
29	18144
30	10080
31	2562156
32	68914
33	173250
34	148400
35	226800
36	211680
37	151200
38	86400
39	27011016
40	757934
41	1854930
42	1798720
43	1801800
44	2494800
45	1940400
46	1425600
47	831600

[1, 1, 2, 6, 23, 1, 109, 1, 10, 619, 16, 45, 40, 4108, 92, 210, 420, 210, 31240, 771, 1645, 2800, 2520, 1344, 268028, 6883, 17325, 15960, 26460, 18144, 10080, 2562156, 68914, 173250, 148400, 226800, 211680, 151200, 86400, 27011016, 757934, 1854930, 1798720, 1801800, 2494800, 1940400, 1425600, 831600]

cp's OEIS Frontend

A350274 Triangle read by rows: T(n,k) is the number of n-permutations whose fourth-shortest cycle has length exactly k; n >= 0, 0 <= k <= max(0,n-3).

Table of values

List of values