A141591 - OEIS

A141591 as a simple table

n	a(n)
0	1
1	1
2	-1
3	-1
4	2
5	-1
6	-1
7	2
8	2
9	-1
10	-1
11	2
12	8
13	2
14	-1
15	-1
16	2
17	22
18	22
19	2
20	-1
21	-1
22	2
23	52
24	132
25	52
26	2
27	-1
28	-1
29	2
30	114
31	604
32	604
33	114
34	2
35	-1
36	-1
37	2
38	240
39	2382
40	4832
41	2382
42	240
43	2
44	-1
45	-1
46	2
47	494
48	8586
49	31238
50	31238
51	8586
52	494
53	2
54	-1
55	-1
56	2
57	1004
58	29216
59	176468
60	312380
61	176468
62	29216
63	1004
64	2
65	-1
66	-1
67	2
68	2026
69	95680
70	910384
71	2620708
72	2620708
73	910384
74	95680
75	2026
76	2
77	-1

[1,1,-1,-1,2,-1,-1,2,2,-1,-1,2,8,2,-1,-1,2,22,22, 2,-1,-1,2,52,132,52,2,-1,-1,2,114,604,604,114,2, -1,-1,2,240,2382,4832,2382,240,2,-1,-1,2,494,8586, 31238,31238,8586,494,2,-1,-1,2,1004,29216,176468, 312380,176468,29216,1004,2,-1,-1,2,2026,95680, 910384,2620708,2620708,910384,95680,2026,2,-1]