A326925 - OEIS

A326925 as a simple table

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

[1,-1,0,2,-1,1,0,3,-1,1,4,0,4,-1,2,5,10,0,5,-1,3, 12,15,20,0,6,-1,5,21,42,35,35,0,7,-1,8,40,84,112, 70,56,0,8,-1,13,72,180,252,252,126,84,0,9,-1,21, 130,360,600,630,504,210,120,0,10,-1,34,231,715]

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715