A079510 - OEIS

A079510 as a simple table

n	a(n)
1	1
2	0
3	2
4	0
5	3
6	6
7	0
8	0
9	20
10	24
11	0
12	0
13	15
14	130
15	120
16	0
17	0
18	0
19	210
20	924
21	720
22	0
23	0
24	0
25	105
26	2380
27	7308
28	5040
29	0
30	0
31	0
32	0
33	2520
34	26432
35	64224
36	40320
37	0
38	0
39	0
40	0
41	945
42	44100
43	303660
44	623376
45	362880
46	0
47	0
48	0
49	0
50	0
51	34650
52	705320
53	3678840
54	6636960
55	3628800

[1,0,2,0,3,6,0,0,20,24,0,0,15,130,120,0,0,0,210, 924,720,0,0,0,105,2380,7308,5040,0,0,0,0,2520, 26432,64224,40320,0,0,0,0,945,44100,303660,623376, 362880,0,0,0,0,0,34650,705320,3678840,6636960, 3628800]