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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 50 |
| 9 | 1578 |
| 10 | 40882 |
| 11 | 958647 |
| 12 | 21345832 |
| 13 | 463651797 |
| 14 | 9986466020 |
| 15 | 215545960223 |
| 16 | 4694864035070 |
[1,50,1578,40882,958647,21345832,463651797, 9986466020,215545960223,4694864035070] |