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| n | a(n) |
|---|---|
| 4 | 48 |
| 5 | 36 |
| 6 | 2952 |
| 7 | 9216 |
| 8 | 881382 |
| 9 | 5913728 |
| 10 | 977782336 |
| 11 | 18737188768 |
| 12 | 6632080108308 |
| 13 | 286675559366712 |
| 14 | 164256548772296153 |
[48,36,2952,9216,881382,5913728,977782336, 18737188768,6632080108308,286675559366712, 164256548772296153] |