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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | 45 |
| 3 | -1239 |
| 4 | 54873 |
| 5 | -3577739 |
| 6 | 322495173 |
| 7 | -38370542175 |
| 8 | 5817952885169 |
| 9 | -1093812528874387 |
| 10 | 249472828725529437 |
| 11 | -67807763939709678951 |
| 12 | 21642089202188444732425 |
| 13 | -8010884242566625383028251 |
[1,-3,45,-1239,54873,-3577739,322495173, -38370542175,5817952885169,-1093812528874387, 249472828725529437,-67807763939709678951, 21642089202188444732425, -8010884242566625383028251] |