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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 40320 |
| 2 | 8201380224 |
| 3 | 1850957806329280 |
| 4 | 427196257460311066608 |
| 5 | 99184884676523895557447104 |
| 6 | 23066495371480810626495005438496 |
| 7 | 5366698074745901061777599023075846976 |
| 8 | 1248760044848501400078426452469652899962528 |
| 9 | 290576954131557518350262914717217159752148225600 |
[1,40320,8201380224,1850957806329280, 427196257460311066608,99184884676523895557447104, 23066495371480810626495005438496, 5366698074745901061777599023075846976, 1248760044848501400078426452469652899962528, 290576954131557518350262914717217159752148225600] |