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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 9 |
| 5 | 153 |
| 6 | 5049 |
| 7 | 328185 |
| 8 | 42335865 |
| 9 | 10880317305 |
| 10 | 5581602777465 |
| 11 | 5721142846901625 |
| 12 | 11722621693301429625 |
| 13 | 48027581077455957173625 |
| 14 | 393489971767596657123509625 |
| 15 | 6447333187412071226968705205625 |
| 16 | 211272661218306162036537500883125625 |
[1,9,153,5049,328185,42335865,10880317305, 5581602777465,5721142846901625, 11722621693301429625,48027581077455957173625, 393489971767596657123509625, 6447333187412071226968705205625, 211272661218306162036537500883125625] |