A350016 - cp's OEIS frontend

A350016 Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-shortest cycle has length exactly k; n >= 0, 0 <= k <= max(0,n-2).

n	a(n)
0	1
1	1
2	2
3	5
4	1
5	17
6	1
7	6
8	74
9	11
10	15
11	20
12	394
13	56
14	60
15	120
16	90
17	2484
18	407
19	525
20	490
21	630
22	504
23	18108
24	3235
25	4725
26	2240
27	4620
28	4032
29	3360
30	149904
31	29143
32	40509
33	27440
34	26460
35	33264
36	30240
37	25920
38	1389456
39	291394
40	398790
41	319760
42	163800
43	302400
44	277200
45	259200
46	226800

[1, 1, 2, 5, 1, 17, 1, 6, 74, 11, 15, 20, 394, 56, 60, 120, 90, 2484, 407, 525, 490, 630, 504, 18108, 3235, 4725, 2240, 4620, 4032, 3360, 149904, 29143, 40509, 27440, 26460, 33264, 30240, 25920, 1389456, 291394, 398790, 319760, 163800, 302400, 277200, 259200, 226800]

cp's OEIS Frontend

A350016 Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-shortest cycle has length exactly k; n >= 0, 0 <= k <= max(0,n-2).

Table of values

List of values