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| n | a(n) |
|---|---|
| 3 | 60 |
| 4 | 501 |
| 5 | 58848 |
| 6 | 3296790 |
| 7 | 248516640 |
| 8 | 24173031960 |
| 9 | 2940529011840 |
| 10 | 436606222187520 |
| 11 | 77604399434419200 |
| 12 | 16251945275067163200 |
| 13 | 3957141527033037235200 |
| 14 | 1107716943231412920806400 |
| 15 | 353062303151154587659468800 |
| 16 | 127059236390700005739355008000 |
[60,501,58848,3296790,248516640,24173031960, 2940529011840,436606222187520,77604399434419200, 16251945275067163200,3957141527033037235200, 1107716943231412920806400, 353062303151154587659468800, 127059236390700005739355008000] |