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| n | a(n) |
|---|---|
| 1 | 1680 |
| 2 | 4320 |
| 3 | 120960 |
| 4 | 166320 |
| 5 | 175560 |
| 6 | 215760 |
| 7 | 725760 |
| 8 | 1814400 |
| 9 | 1080647568000 |
| 10 | 104613949440000 |
| 11 | 115880067072000 |
[1680,4320,120960,166320,175560,215760,725760, 1814400,1080647568000,104613949440000, 115880067072000] |