n | a(n) |
---|---|
0 | -1 |
1 | -1 |
2 | 2 |
3 | -1 |
4 | 6 |
5 | -6 |
6 | -1 |
7 | 12 |
8 | -30 |
9 | 20 |
10 | -1 |
11 | 20 |
12 | -90 |
13 | 140 |
14 | -70 |
15 | -1 |
16 | 30 |
17 | -210 |
18 | 560 |
19 | -630 |
20 | 252 |
21 | -1 |
22 | 42 |
23 | -420 |
24 | 1680 |
25 | -3150 |
26 | 2772 |
27 | -924 |
28 | -1 |
29 | 56 |
30 | -756 |
31 | 4200 |
32 | -11550 |
33 | 16632 |
34 | -12012 |
35 | 3432 |
36 | -1 |
37 | 72 |
38 | -1260 |
39 | 9240 |
40 | -34650 |
41 | 72072 |
42 | -84084 |
43 | 51480 |
44 | -12870 |
45 | -1 |
46 | 90 |
47 | -1980 |
48 | 18480 |
49 | -90090 |
50 | 252252 |
51 | -420420 |
52 | 411840 |
53 | -218790 |
54 | 48620 |
55 | -1 |
56 | 110 |
57 | -2970 |
58 | 34320 |
59 | -210210 |
60 | 756756 |
61 | -1681680 |
62 | 2333760 |
63 | -1969110 |
64 | 923780 |
65 | -184756 |
[-1,-1,2,-1,6,-6,-1,12,-30,20,-1,20,-90,140,-70, -1,30,-210,560,-630,252,-1,42,-420,1680,-3150, 2772,-924,-1,56,-756,4200,-11550,16632,-12012, 3432,-1,72,-1260,9240,-34650,72072,-84084,51480, -12870,-1,90,-1980,18480,-90090,252252,-420420, 411840,-218790,48620,-1,110,-2970,34320,-210210, 756756,-1681680,2333760,-1969110,923780,-184756] |