A137562 - OEIS

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A137562 as a simple table

n	a(n)
1	1
2	0
3	1
4	0
5	-1
6	0
7	5
8	0
9	-6
10	0
11	1
12	0
13	61
14	0
15	-75
16	0
17	15
18	0
19	-1
20	0
21	1385
22	0
23	-1708
24	0
25	350
26	0
27	-28
28	0
29	1
30	0
31	50521
32	0
33	-62325
34	0
35	12810
36	0
37	-1050
38	0
39	45
40	0
41	-1

[1,0,1,0,-1,0,5,0,-6,0,1,0,61,0,-75,0,15,0,-1,0, 1385,0,-1708,0,350,0,-28,0,1,0,50521,0,-62325,0, 12810,0,-1050,0,45,0,-1]