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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 48 |
| 4 | 432 |
| 5 | 5760 |
| 6 | 83520 |
| 7 | 1572480 |
| 8 | 32659200 |
| 9 | 792529920 |
| 10 | 21337344000 |
| 11 | 642820147200 |
| 12 | 21181450752000 |
| 13 | 763681830912000 |
| 14 | 29769991592140800 |
| 15 | 1250889916243968000 |
| 16 | 56282514026618880000 |
| 17 | 2701972433782702080000 |
[3,6,48,432,5760,83520,1572480,32659200,792529920, 21337344000,642820147200,21181450752000, 763681830912000,29769991592140800, 1250889916243968000,56282514026618880000, 2701972433782702080000] |