n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -6 |
4 | 30 |
5 | -180 |
6 | 1324 |
7 | -11424 |
8 | 113376 |
9 | -1271232 |
10 | 15889280 |
11 | -218989760 |
12 | 3298513600 |
13 | -53897151360 |
14 | 949389619840 |
15 | -17931842342400 |
16 | 361486218406400 |
17 | -7746121344512000 |
18 | 175813073606092800 |
19 | -4213227577441536000 |
[0,0,2,-6,30,-180,1324,-11424,113376,-1271232, 15889280,-218989760,3298513600,-53897151360, 949389619840,-17931842342400,361486218406400, -7746121344512000,175813073606092800, -4213227577441536000] |