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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 4 |
| 2 | 36 |
| 3 | 864 |
| 4 | 40320 |
| 5 | 3110400 |
| 6 | 359251200 |
| 7 | 58118860800 |
| 8 | 12553673932800 |
| 9 | 3492203839488000 |
| 10 | 1216451004088320000 |
| 11 | 518769566666588160000 |
| 12 | 265906457885674045440000 |
| 13 | 161316584450642254233600000 |
[3,4,36,864,40320,3110400,359251200,58118860800, 12553673932800,3492203839488000, 1216451004088320000,518769566666588160000, 265906457885674045440000, 161316584450642254233600000] |