n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | -1 |
3 | 3 |
4 | -6 |
5 | 15 |
6 | -150 |
7 | 1575 |
8 | -12600 |
9 | 101115 |
10 | -1103760 |
11 | 14708925 |
12 | -198336600 |
13 | 2783105325 |
14 | -43768604880 |
15 | 754367488875 |
16 | -13648397162400 |
17 | 262037979177975 |
18 | -5424089927256000 |
19 | 118958487086664225 |
[0,0,-1,3,-6,15,-150,1575,-12600,101115,-1103760, 14708925,-198336600,2783105325,-43768604880, 754367488875,-13648397162400,262037979177975, -5424089927256000,118958487086664225] |