A145881 - cp's OEIS frontend

A145881 Triangle read by rows: T(n,k) is the number of even permutations of {1,2,...,n} with no fixed points and having k excedances (n>=1; k>=1).

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	3
7	0
8	1
9	11
10	11
11	1
12	0
13	25
14	80
15	25
16	0
17	1
18	57
19	407
20	407
21	57
22	1
23	0
24	119
25	1680
26	3815
27	1680
28	119
29	0
30	1
31	247
32	6211
33	26917
34	26917
35	6211
36	247
37	1
38	0
39	501
40	21432
41	160053
42	303504
43	160053
44	21432
45	501
46	0
47	1
48	1013
49	70775
50	852347
51	2747009
52	2747009
53	852347
54	70775

[0, 0, 1, 1, 0, 3, 0, 1, 11, 11, 1, 0, 25, 80, 25, 0, 1, 57, 407, 407, 57, 1, 0, 119, 1680, 3815, 1680, 119, 0, 1, 247, 6211, 26917, 26917, 6211, 247, 1, 0, 501, 21432, 160053, 303504, 160053, 21432, 501, 0, 1, 1013, 70775, 852347, 2747009, 2747009, 852347, 70775]

cp's OEIS Frontend

A145881 Triangle read by rows: T(n,k) is the number of even permutations of {1,2,...,n} with no fixed points and having k excedances (n>=1; k>=1).

Table of values

List of values