n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | -1 |
3 | -12 |
4 | 42 |
5 | 172 |
6 | -2250 |
7 | 896 |
8 | 153384 |
9 | -952688 |
10 | -11282040 |
11 | 209648736 |
12 | 279312528 |
13 | -43286799008 |
14 | 318803909424 |
15 | 8375677890176 |
16 | -180484941598080 |
17 | -918969731775232 |
18 | 79664942329607808 |
19 | -561407566293575168 |
[0,2,-1,-12,42,172,-2250,896,153384,-952688, -11282040,209648736,279312528,-43286799008, 318803909424,8375677890176,-180484941598080, -918969731775232,79664942329607808, -561407566293575168] |