A319876 - cp's OEIS frontend

A319876 Irregular triangle read by rows where T(n,k) is the number of permutations of {1,...,n} whose action on 2-element subsets of {1,...,n} has k cycles.

n	a(n)
1	1
2	0
3	2
4	0
5	2
6	3
7	1
8	0
9	0
10	14
11	0
12	9
13	0
14	1
15	0
16	0
17	24
18	50
19	20
20	0
21	15
22	10
23	0
24	0
25	1
26	0
27	0
28	0
29	264
30	0
31	340
32	0
33	40
34	0
35	60
36	0
37	15
38	0
39	0
40	0
41	1
42	0
43	0
44	0
45	720
46	1764
47	504
48	0
49	1120
50	630
51	0
52	0
53	70
54	105
55	105
56	0
57	0
58	21
59	0
60	0
61	0
62	0
63	1
64	0
65	0
66	0
67	0
68	13488
69	0
70	14112
71	0
72	3724
73	0

[1, 0, 2, 0, 2, 3, 1, 0, 0, 14, 0, 9, 0, 1, 0, 0, 24, 50, 20, 0, 15, 10, 0, 0, 1, 0, 0, 0, 264, 0, 340, 0, 40, 0, 60, 0, 15, 0, 0, 0, 1, 0, 0, 0, 720, 1764, 504, 0, 1120, 630, 0, 0, 70, 105, 105, 0, 0, 21, 0, 0, 0, 0, 1, 0, 0, 0, 0, 13488, 0, 14112, 0, 3724, 0]

cp's OEIS Frontend

A319876 Irregular triangle read by rows where T(n,k) is the number of permutations of {1,...,n} whose action on 2-element subsets of {1,...,n} has k cycles.

Table of values

List of values