A144151 - cp's OEIS frontend

A144151 Triangle T(n,k), n>=0, 0<=k<=n, read by rows: T(n,k) = number of ways an undirected cycle of length k can be built from n labeled nodes.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	4
12	6
13	4
14	3
15	1
16	5
17	10
18	10
19	15
20	12
21	1
22	6
23	15
24	20
25	45
26	72
27	60
28	1
29	7
30	21
31	35
32	105
33	252
34	420
35	360
36	1
37	8
38	28
39	56
40	210
41	672
42	1680
43	2880
44	2520
45	1
46	9
47	36
48	84
49	378
50	1512
51	5040
52	12960
53	22680
54	20160
55	1
56	10
57	45
58	120
59	630
60	3024
61	12600
62	43200
63	113400
64	201600
65	181440

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 3, 1, 5, 10, 10, 15, 12, 1, 6, 15, 20, 45, 72, 60, 1, 7, 21, 35, 105, 252, 420, 360, 1, 8, 28, 56, 210, 672, 1680, 2880, 2520, 1, 9, 36, 84, 378, 1512, 5040, 12960, 22680, 20160, 1, 10, 45, 120, 630, 3024, 12600, 43200, 113400, 201600, 181440]

cp's OEIS Frontend

A144151 Triangle T(n,k), n>=0, 0<=k<=n, read by rows: T(n,k) = number of ways an undirected cycle of length k can be built from n labeled nodes.

Table of values

List of values