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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 17 |
| 3 | -769 |
| 4 | 66401 |
| 5 | -9313281 |
| 6 | 1927198833 |
| 7 | -551835917697 |
| 8 | 208856369686977 |
| 9 | -100945109069282817 |
| 10 | 60655475821737151953 |
| 11 | -44346899335054478649345 |
| 12 | 38762487400695339770533665 |
[1,-1,17,-769,66401,-9313281,1927198833, -551835917697,208856369686977,-100945109069282817, 60655475821737151953,-44346899335054478649345, 38762487400695339770533665] |