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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 384 |
| 3 | 46080 |
| 4 | 10321920 |
| 5 | 3715891200 |
| 6 | 1961990553600 |
| 7 | 1428329123020800 |
| 8 | 1371195958099968000 |
| 9 | 1678343852714360832000 |
| 10 | 2551082656125828464640000 |
| 11 | 4714400748520531002654720000 |
| 12 | 10409396852733332453861621760000 |
[1,8,384,46080,10321920,3715891200,1961990553600, 1428329123020800,1371195958099968000, 1678343852714360832000,2551082656125828464640000, 4714400748520531002654720000, 10409396852733332453861621760000] |