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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 1216 |
| 4 | 9231031 |
| 5 | 517724571330 |
| 6 | 165121260897866936 |
| 7 | 245134923025161071850640 |
| 8 | 1446656016533971629592879758484 |
| 9 | 29816381062270870630530816568741792176 |
[0,3,1216,9231031,517724571330,165121260897866936, 245134923025161071850640, 1446656016533971629592879758484, 29816381062270870630530816568741792176] |