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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 31 |
| 2 | -2848 |
| 3 | 413823 |
| 4 | -68767135 |
| 5 | 12310047967 |
| 6 | -2309368876639 |
| 7 | 447436508910495 |
| 8 | -88755684988520798 |
| 9 | 17924937024841839390 |
| 10 | -3671642907594608226078 |
| 11 | 760722183234128461061246 |
| 12 | -159105706560247952472114973 |
[1,31,-2848,413823,-68767135,12310047967, -2309368876639,447436508910495,-88755684988520798, 17924937024841839390,-3671642907594608226078, 760722183234128461061246, -159105706560247952472114973] |