A281269 - OEIS

A281269 as a simple table

n	a(n)
2	1
3	0
4	3
5	0
6	3
7	4
8	0
9	0
10	30
11	5
12	0
13	0
14	15
15	150
16	6
17	0
18	0
19	0
20	315
21	525
22	7
23	0
24	0
25	0
26	105
27	3360
28	1568
29	8
30	0
31	0
32	0
33	0
34	3780
35	24570
36	4284
37	9
38	0
39	0
40	0
41	0
42	945
43	69300
44	142380
45	11070
46	10
47	0
48	0
49	0
50	0
51	0
52	51975
53	866250
54	713790
55	27555
56	11
57	0
58	0
59	0
60	0
61	0
62	10395
63	1455300
64	8399160
65	3250500
66	66792
67	12

[1,0,3,0,3,4,0,0,30,5,0,0,15,150,6,0,0,0,315,525, 7,0,0,0,105,3360,1568,8,0,0,0,0,3780,24570,4284,9, 0,0,0,0,945,69300,142380,11070,10,0,0,0,0,0,51975, 866250,713790,27555,11,0,0,0,0,0,10395,1455300, 8399160,3250500,66792,12]