n | a(n) |
---|---|
1 | 0 |
2 | -1 |
3 | -1 |
4 | 1 |
5 | -1 |
6 | 24 |
7 | -1 |
8 | 49 |
9 | 14 |
10 | 82 |
11 | -1 |
12 | 1700 |
13 | -1 |
14 | 172 |
15 | 201 |
16 | 993 |
17 | -1 |
18 | 5793 |
19 | -1 |
20 | 7958 |
21 | 409 |
22 | 448 |
23 | -1 |
24 | 331716 |
25 | 94 |
26 | 634 |
27 | 689 |
28 | 21896 |
29 | -1 |
30 | 809928 |
31 | -1 |
32 | 32705 |
33 | 1041 |
34 | 1102 |
35 | 1177 |
36 | 10077605 |
37 | -1 |
38 | 1384 |
39 | 1465 |
40 | 2559910 |
41 | -1 |
42 | 3111600 |
43 | -1 |
44 | 85100 |
45 | 91047 |
46 | 2044 |
47 | -1 |
48 | 254803844 |
49 | 286 |
50 | 124907 |
[0,-1,-1,1,-1,24,-1,49,14,82,-1,1700,-1,172,201, 993,-1,5793,-1,7958,409,448,-1,331716,94,634,689, 21896,-1,809928,-1,32705,1041,1102,1177,10077605, -1,1384,1465,2559910,-1,3111600,-1,85100,91047, 2044,-1,254803844,286,124907] |