n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | -1 |
3 | 5 |
4 | -25 |
5 | 141 |
6 | -849 |
7 | 5349 |
8 | -34825 |
9 | 232445 |
10 | -1582081 |
11 | 10938709 |
12 | -76616249 |
13 | 542472685 |
14 | -3876400305 |
15 | 27919883205 |
16 | -202480492905 |
17 | 1477306676445 |
18 | -10836099051105 |
19 | 79861379898165 |
20 | -591082795606425 |
[1,1,-1,5,-25,141,-849,5349,-34825,232445, -1582081,10938709,-76616249,542472685,-3876400305, 27919883205,-202480492905,1477306676445, -10836099051105,79861379898165,-591082795606425] |