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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 48 |
| 2 | 1280 |
| 3 | 129024 |
| 4 | 1769472 |
| 5 | 81749606400 |
| 6 | 4637432217600 |
| 7 | 3296144130048000 |
| 8 | 46620662575398912000 |
| 9 | 750318428272302489600 |
| 10 | 5639235345120252395520000 |
| 11 | 72287478143981475374039040000 |
| 12 | 7543041197632849604247552000000 |
| 13 | 1461479318123759876522171695104000000 |
| 14 | 4746884825265972078944013665697792000000 |
[2,48,1280,129024,1769472,81749606400, 4637432217600,3296144130048000, 46620662575398912000,750318428272302489600, 5639235345120252395520000, 72287478143981475374039040000, 7543041197632849604247552000000, 1461479318123759876522171695104000000, 4746884825265972078944013665697792000000] |