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| n | a(n) |
|---|---|
| 8 | 40320 |
| 9 | 1451520 |
| 10 | 30240000 |
| 11 | 479001600 |
| 12 | 6411968640 |
| 13 | 76592355840 |
| 14 | 843184742400 |
| 15 | 8734434508800 |
| 16 | 86355926616960 |
| 17 | 823172919528960 |
| 18 | 7621934141203200 |
| 19 | 68937160460313600 |
| 20 | 611692004959217280 |
| 21 | 5342844138794426880 |
| 22 | 46061530905262118400 |
| 23 | 392795626402384128000 |
[40320,1451520,30240000,479001600,6411968640, 76592355840,843184742400,8734434508800, 86355926616960,823172919528960,7621934141203200, 68937160460313600,611692004959217280, 5342844138794426880,46061530905262118400, 392795626402384128000] |