n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 7 |
5 | -1 |
6 | 25 |
7 | 25 |
8 | 1 |
9 | 111 |
10 | 111 |
11 | -1 |
12 | 465 |
13 | 465 |
14 | 1 |
15 | 1975 |
16 | 1975 |
17 | -1 |
18 | 8361 |
19 | 8361 |
20 | 1 |
21 | 35423 |
22 | 35423 |
23 | -1 |
24 | 150049 |
25 | 150049 |
26 | 1 |
27 | 635623 |
28 | 635623 |
29 | -1 |
30 | 2692537 |
31 | 2692537 |
32 | 1 |
33 | 11405775 |
34 | 11405775 |
35 | -1 |
36 | 48315633 |
37 | 48315633 |
38 | 1 |
39 | 204668311 |
40 | 204668311 |
41 | -1 |
42 | 866988873 |
43 | 866988873 |
44 | 1 |
45 | 3672623807 |
46 | 3672623807 |
47 | -1 |
[1,1,1,7,7,-1,25,25,1,111,111,-1,465,465,1,1975, 1975,-1,8361,8361,1,35423,35423,-1,150049,150049, 1,635623,635623,-1,2692537,2692537,1,11405775, 11405775,-1,48315633,48315633,1,204668311, 204668311,-1,866988873,866988873,1,3672623807, 3672623807,-1] |