A186366 - cp's OEIS frontend

A186366 Triangle read by rows: T(n,k) is the number of cycle-up-down permutations of {1,2,...,n} having k cycles (1<=k<=n).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	2
8	7
9	6
10	1
11	5
12	20
13	25
14	10
15	1
16	16
17	70
18	105
19	65
20	15
21	1
22	61
23	287
24	490
25	385
26	140
27	21
28	1
29	272
30	1356
31	2548
32	2345
33	1120
34	266
35	28
36	1
37	1385
38	7248
39	14698
40	15204
41	8715
42	2772
43	462
44	36
45	1
46	7936
47	43280
48	93420
49	105880
50	69405
51	26985
52	6090
53	750
54	45
55	1
56	50521
57	285571
58	649715
59	793210
60	577225
61	260337
62	72765
63	12210
64	1155
65	55
66	1

[1, 1, 1, 1, 3, 1, 2, 7, 6, 1, 5, 20, 25, 10, 1, 16, 70, 105, 65, 15, 1, 61, 287, 490, 385, 140, 21, 1, 272, 1356, 2548, 2345, 1120, 266, 28, 1, 1385, 7248, 14698, 15204, 8715, 2772, 462, 36, 1, 7936, 43280, 93420, 105880, 69405, 26985, 6090, 750, 45, 1, 50521, 285571, 649715, 793210, 577225, 260337, 72765, 12210, 1155, 55, 1]

cp's OEIS Frontend

A186366 Triangle read by rows: T(n,k) is the number of cycle-up-down permutations of {1,2,...,n} having k cycles (1<=k<=n).

Table of values

List of values