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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | 33 |
| 3 | -731 |
| 4 | 25857 |
| 5 | -1311379 |
| 6 | 89060065 |
| 7 | -7778778091 |
| 8 | 849264442881 |
| 9 | -113234181108643 |
| 10 | 18073465545032353 |
| 11 | -3395124358886313595 |
| 12 | 740061366713642835201 |
| 13 | -185005977382236600650035 |
[1,-3,33,-731,25857,-1311379,89060065,-7778778091, 849264442881,-113234181108643,18073465545032353, -3395124358886313595,740061366713642835201, -185005977382236600650035] |