A380977 - cp's OEIS frontend

A380977 Triangle read by rows: T(n,m) (1<=m<=n) = number of surjections f:[n]->[m] with f(n) != f(j), j

n	a(n)
1	1
2	0
3	2
4	0
5	2
6	6
7	0
8	2
9	18
10	24
11	0
12	2
13	42
14	144
15	120
16	0
17	2
18	90
19	600
20	1200
21	720
22	0
23	2
24	186
25	2160
26	7800
27	10800
28	5040
29	0
30	2
31	378
32	7224
33	42000
34	100800
35	105840
36	40320
37	0
38	2
39	762
40	23184
41	204120
42	756000
43	1340640
44	1128960
45	362880
46	0
47	2
48	1530
49	72600
50	932400
51	5004720
52	13335840
53	18627840
54	13063680
55	3628800

[1, 0, 2, 0, 2, 6, 0, 2, 18, 24, 0, 2, 42, 144, 120, 0, 2, 90, 600, 1200, 720, 0, 2, 186, 2160, 7800, 10800, 5040, 0, 2, 378, 7224, 42000, 100800, 105840, 40320, 0, 2, 762, 23184, 204120, 756000, 1340640, 1128960, 362880, 0, 2, 1530, 72600, 932400, 5004720, 13335840, 18627840, 13063680, 3628800]

cp's OEIS Frontend

A380977 Triangle read by rows: T(n,m) (1<=m<=n) = number of surjections f:[n]->[m] with f(n) != f(j), j

Table of values

List of values