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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 12 |
| 4 | 32 |
| 5 | 960 |
| 6 | 12288 |
| 7 | 40320 |
| 8 | 1296384 |
| 9 | 13862592 |
| 10 | 126186000 |
| 11 | 4703871392 |
| 12 | 153495217056 |
| 13 | 4312093043076 |
| 14 | 225409456295800 |
| 15 | 7671288697001460 |
[2,8,12,32,960,12288,40320,1296384,13862592, 126186000,4703871392,153495217056,4312093043076, 225409456295800,7671288697001460] |