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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -32 |
| 2 | 283392 |
| 3 | 1121740800 |
| 4 | 157951397068800 |
| 5 | 14184297129466920960 |
| 6 | 5248874425245870210416640 |
| 7 | 2544005109030684773416383283200 |
[2,-32,283392,1121740800,157951397068800, 14184297129466920960,5248874425245870210416640, 2544005109030684773416383283200] |