A237928 - cp's OEIS frontend

A237928 Triangular array read by rows. T(n,k) is the number of n-permutations with k cycles of length one or k cycles of length two, n>=0,0<=k<=n.

n	a(n)
0	1
1	1
2	1
3	2
4	1
5	1
6	3
7	3
8	0
9	1
10	18
11	14
12	9
13	0
14	1
15	95
16	75
17	35
18	10
19	0
20	1
21	540
22	369
23	135
24	55
25	15
26	0
27	1
28	3759
29	2800
30	1239
31	420
32	70
33	21
34	0
35	1
36	30310
37	22980
38	10570
39	2884
40	735
41	112
42	28
43	0
44	1
45	272817
46	202797
47	87534
48	24780
49	6489
50	1134
51	168
52	36
53	0
54	1

[1, 1, 1, 2, 1, 1, 3, 3, 0, 1, 18, 14, 9, 0, 1, 95, 75, 35, 10, 0, 1, 540, 369, 135, 55, 15, 0, 1, 3759, 2800, 1239, 420, 70, 21, 0, 1, 30310, 22980, 10570, 2884, 735, 112, 28, 0, 1, 272817, 202797, 87534, 24780, 6489, 1134, 168, 36, 0, 1]

cp's OEIS Frontend

A237928 Triangular array read by rows. T(n,k) is the number of n-permutations with k cycles of length one or k cycles of length two, n>=0,0<=k<=n.

Table of values

List of values