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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 63 |
| 4 | 3465 |
| 5 | 363825 |
| 6 | 62214075 |
| 7 | 15740160975 |
| 8 | 5524796502225 |
| 9 | 2569030373534625 |
| 10 | 1528573072253101875 |
| 11 | 1132672646539548489375 |
| 12 | 1022803399825212285905625 |
| 13 | 1105650475211054481063980625 |
| 14 | 1409704355894094463356575296875 |
[1,3,63,3465,363825,62214075,15740160975, 5524796502225,2569030373534625, 1528573072253101875,1132672646539548489375, 1022803399825212285905625, 1105650475211054481063980625, 1409704355894094463356575296875] |