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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 128 |
| 4 | 4608 |
| 5 | 460800 |
| 6 | 66355200 |
| 7 | 16986931200 |
| 8 | 5503765708800 |
| 9 | 2663822603059200 |
| 10 | 2088436920798412800 |
| 11 | 1879593228718571520000 |
| 12 | 2435952824419268689920000 |
| 13 | 3897524519070829903872000000 |
| 14 | 6875233251640943950430208000000 |
[2,8,128,4608,460800,66355200,16986931200, 5503765708800,2663822603059200, 2088436920798412800,1879593228718571520000, 2435952824419268689920000, 3897524519070829903872000000, 6875233251640943950430208000000] |