A088391 - OEIS

A088391 as a simple table

n	a(n)
1	2
2	1
3	0
4	5
5	4
6	0
7	143
8	25
9	0
10	2
11	1
12	0
13	77
14	715
15	0
16	125
17	5882353
18	0
19	52631579
20	1
21	0
22	5
23	4347826087
24	0
25	8
26	385
27	0
28	3575
29	3448275862069
30	0
31	0
32	625
33	0
34	29411765
35	286
36	0
37	0
38	263157895
39	0
40	5
41	0
42	0
43	0
44	25
45	0
46	21739130435
47	2127659574468085106383
48	0

[2,1,0,5,4,0,143,25,0,2,1,0,77,715,0,125,5882353, 0,52631579,1,0,5,4347826087,0,8,385,0,3575, 3448275862069,0,0,625,0,29411765,286,0,0, 263157895,0,5,0,0,0,25,0,21739130435, 2127659574468085106383,0]