n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -1 |
3 | -1 |
4 | 9 |
5 | -15 |
6 | -25 |
7 | 471 |
8 | -1295 |
9 | 3329 |
10 | 65647 |
11 | -98129 |
12 | 3713721 |
13 | 33219953 |
14 | 270347415 |
15 | 6061172807 |
16 | 68349644129 |
17 | 1202915380097 |
18 | 19022739778399 |
19 | 352452078288991 |
20 | 6138793986311401 |
21 | 130474490203385201 |
[1,1,-1,-1,9,-15,-25,471,-1295,3329,65647,-98129, 3713721,33219953,270347415,6061172807,68349644129, 1202915380097,19022739778399,352452078288991, 6138793986311401,130474490203385201] |