n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 5 |
3 | -25 |
4 | 129 |
5 | -681 |
6 | 3653 |
7 | -19825 |
8 | 108545 |
9 | -598417 |
10 | 3317445 |
11 | -18474633 |
12 | 103274625 |
13 | -579168825 |
14 | 3256957317 |
15 | -18359266785 |
16 | 103706427393 |
17 | -586889743905 |
18 | 3326741166725 |
19 | -18885056428537 |
20 | 107347191941249 |
21 | -610916200215241 |
[1,-1,5,-25,129,-681,3653,-19825,108545,-598417, 3317445,-18474633,103274625,-579168825,3256957317, -18359266785,103706427393,-586889743905, 3326741166725,-18885056428537,107347191941249, -610916200215241] |