A145225 - cp's OEIS frontend

A145225 Triangle read by rows: T(n,k) is the number of odd permutations (of an n-set) with exactly k fixed points.

n	a(n)
0	0
1	0
2	0
3	1
4	0
5	0
6	0
7	3
8	0
9	0
10	6
11	0
12	6
13	0
14	0
15	20
16	30
17	0
18	10
19	0
20	0
21	135
22	120
23	90
24	0
25	15
26	0
27	0
28	924
29	945
30	420
31	210
32	0
33	21
34	0
35	0
36	7420
37	7392
38	3780
39	1120
40	420
41	0
42	28
43	0
44	0
45	66744
46	66780
47	33264
48	11340
49	2520
50	756
51	0
52	36
53	0
54	0

[0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 6, 0, 6, 0, 0, 20, 30, 0, 10, 0, 0, 135, 120, 90, 0, 15, 0, 0, 924, 945, 420, 210, 0, 21, 0, 0, 7420, 7392, 3780, 1120, 420, 0, 28, 0, 0, 66744, 66780, 33264, 11340, 2520, 756, 0, 36, 0, 0]

cp's OEIS Frontend

A145225 Triangle read by rows: T(n,k) is the number of odd permutations (of an n-set) with exactly k fixed points.

Table of values

List of values