n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 48 |
5 | 360 |
6 | 3600 |
7 | 45360 |
8 | 645120 |
9 | 10160640 |
10 | 177811200 |
11 | 3432844800 |
12 | 72329241600 |
13 | 1650160512000 |
14 | 40537905408000 |
15 | 1067062284288000 |
16 | 29961435119616000 |
17 | 893842506805248000 |
18 | 28234468042260480000 |
[1,0,0,6,48,360,3600,45360,645120,10160640, 177811200,3432844800,72329241600,1650160512000, 40537905408000,1067062284288000,29961435119616000, 893842506805248000,28234468042260480000] |