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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -38 |
| 2 | 760 |
| 3 | -10640 |
| 4 | 117002 |
| 5 | -1075248 |
| 6 | 8582224 |
| 7 | -61061440 |
| 8 | 394559320 |
| 9 | -2348001494 |
| 10 | 13008061200 |
| 11 | -67666510320 |
| 12 | 332809029680 |
| 13 | -1556541579760 |
| 14 | 6955832361824 |
| 15 | -29820933412800 |
| 16 | 123079426294922 |
| 17 | -490508040685920 |
[1,-38,760,-10640,117002,-1075248,8582224, -61061440,394559320,-2348001494,13008061200, -67666510320,332809029680,-1556541579760, 6955832361824,-29820933412800,123079426294922, -490508040685920] |