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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 4620 |
| 5 | 6399679104 |
| 6 | 54803251858747392000 |
| 7 | 8358350073642819567827288064000000 |
| 8 | 52632311069252193290838179018133211213037568000000000 |
| 9 | 27453701472592984509237630691917200216593343493991841417624813568000000000000 |
| 10 | 2147874070223278653793958679139553326245411209910799706636182402354754938369146903440396050759680000000000 |
[1,1,5,4620,6399679104,54803251858747392000, 8358350073642819567827288064000000, 52632311069252193290838179018133211213037568000000\ 000, 27453701472592984509237630691917200216593343493991\ 841417624813568000000000000, 21478740702232786537939586791395533262454112099107\ 99706636182402354754938369146903440396050759680000\ 000000] |