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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 17 |
| 3 | -385 |
| 4 | 15073 |
| 5 | -1010945 |
| 6 | 101590513 |
| 7 | -14396384769 |
| 8 | 2765830859457 |
| 9 | -694784293696513 |
| 10 | 221386930443511505 |
| 11 | -87298037019243856513 |
| 12 | 41742102489497599699873 |
| 13 | -23796035609379191857799425 |
[1,-1,17,-385,15073,-1010945,101590513, -14396384769,2765830859457,-694784293696513, 221386930443511505,-87298037019243856513, 41742102489497599699873, -23796035609379191857799425] |