n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | -1 |
3 | 5 |
4 | 11 |
5 | -91 |
6 | -301 |
7 | 3485 |
8 | 15371 |
9 | -228811 |
10 | -1261501 |
11 | 22951565 |
12 | 151846331 |
13 | -3264973531 |
14 | -25201039501 |
15 | 625232757245 |
16 | 5515342166891 |
17 | -155079142742251 |
18 | -1538993024478301 |
19 | 48364005482108525 |
20 | 533289474412481051 |
21 | -18523127502677822971 |
[1,-1,-1,5,11,-91,-301,3485,15371,-228811, -1261501,22951565,151846331,-3264973531, -25201039501,625232757245,5515342166891, -155079142742251,-1538993024478301, 48364005482108525,533289474412481051, -18523127502677822971] |