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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 168 |
| 2 | 1876896 |
| 3 | 2317591180800 |
| 4 | 187035198320488089600 |
| 5 | 61637759336805268655956377600 |
| 6 | 35832085525362833262818017603275320524800 |
| 7 | 85057500275967538647136529625446531799449748111360000 |
[1,168,1876896,2317591180800, 187035198320488089600, 61637759336805268655956377600, 35832085525362833262818017603275320524800, 85057500275967538647136529625446531799449748111360\ 000] |