A173424 - OEIS

A173424 as a simple table

n	a(n)
0	1
1	1
2	1
3	3
4	1
5	3
6	15
7	3
8	3
9	15
10	105
11	15
12	9
13	15
14	105
15	945
16	105
17	45
18	45
19	105
20	945
21	10395
22	945
23	315
24	225
25	315
26	945
27	10395
28	135135
29	10395
30	2835
31	1575
32	1575
33	2835
34	10395
35	135135
36	2027025
37	135135
38	31185
39	14175
40	11025
41	14175
42	31185
43	135135
44	2027025
45	34459425

[1,1,1,3,1,3,15,3,3,15,105,15,9,15,105,945,105,45, 45,105,945,10395,945,315,225,315,945,10395,135135, 10395,2835,1575,1575,2835,10395,135135,2027025, 135135,31185,14175,11025,14175,31185,135135, 2027025,34459425]