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| n | a(n) |
|---|---|
| 3 | 6 |
| 4 | 72 |
| 5 | 1440 |
| 6 | 49680 |
| 7 | 2998800 |
| 8 | 324237312 |
| 9 | 64440883584 |
| 10 | 24059497893120 |
| 11 | 17143668999705600 |
| 12 | 23569875858252303360 |
| 13 | 63000019679242001900544 |
| 14 | 329150325651711743768150016 |
| 15 | 3374625529825460904919664793600 |
| 16 | 68094821953233373962606732799672320 |
[6,72,1440,49680,2998800,324237312,64440883584, 24059497893120,17143668999705600, 23569875858252303360,63000019679242001900544, 329150325651711743768150016, 3374625529825460904919664793600, 68094821953233373962606732799672320] |