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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 24 |
| 3 | 16 |
| 4 | 5760 |
| 5 | 2304 |
| 6 | 580608 |
| 7 | 165888 |
| 8 | 1393459200 |
| 9 | 309657600 |
| 10 | 73574645760 |
| 11 | 13377208320 |
| 12 | 24103053950976000 |
| 13 | 3708162146304000 |
| 14 | 578473294823424000 |
| 15 | 77129772643123200 |
| 16 | 9440684171518279680000 |
| 17 | 100969884187361280000 |
[1,2,24,16,5760,2304,580608,165888,1393459200, 309657600,73574645760,13377208320, 24103053950976000,3708162146304000, 578473294823424000,77129772643123200, 9440684171518279680000,100969884187361280000] |