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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 9 |
| 5 | 135 |
| 6 | 6075 |
| 7 | 1913625 |
| 8 | 602791875 |
| 9 | 1708914965625 |
| 10 | 24223869637734375 |
| 11 | 3777106873263732421875 |
| 12 | 1766836167640942433642578125 |
| 13 | 10744263248137144009663040771484375 |
| 14 | 457356694421659081059931729616180419921875 |
[1,1,3,9,135,6075,1913625,602791875,1708914965625, 24223869637734375,3777106873263732421875, 1766836167640942433642578125, 10744263248137144009663040771484375, 457356694421659081059931729616180419921875] |