n | a(n) |
---|---|
1 | -1 |
2 | -1 |
3 | 5 |
4 | -1 |
5 | 12 |
6 | -32 |
7 | -1 |
8 | 14 |
9 | 7 |
10 | -126 |
11 | 231 |
12 | -1 |
13 | 16 |
14 | 16 |
15 | -160 |
16 | -160 |
17 | 1280 |
18 | -1792 |
19 | -1 |
20 | 18 |
21 | 18 |
22 | -198 |
23 | 9 |
24 | -396 |
25 | 1716 |
26 | -66 |
27 | 2574 |
28 | -12870 |
29 | 14586 |
30 | -1 |
31 | 20 |
32 | 20 |
33 | -240 |
34 | 20 |
35 | -480 |
36 | 2240 |
37 | -240 |
38 | -240 |
39 | 6720 |
40 | -17920 |
41 | 2240 |
42 | -35840 |
43 | 129024 |
44 | -122880 |
45 | -1 |
46 | 22 |
47 | 22 |
48 | -286 |
49 | 22 |
50 | -572 |
51 | 2860 |
52 | 11 |
53 | -572 |
54 | -286 |
55 | 8580 |
56 | -24310 |
57 | -286 |
58 | 4290 |
59 | 8580 |
60 | -97240 |
61 | 184756 |
62 | 715 |
[-1,-1,5,-1,12,-32,-1,14,7,-126,231,-1,16,16,-160, -160,1280,-1792,-1,18,18,-198,9,-396,1716,-66, 2574,-12870,14586,-1,20,20,-240,20,-480,2240,-240, -240,6720,-17920,2240,-35840,129024,-122880,-1,22, 22,-286,22,-572,2860,11,-572,-286,8580,-24310, -286,4290,8580,-97240,184756,715] |