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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 12 |
| 3 | -296 |
| 4 | 8208 |
| 5 | -317088 |
| 6 | 22384832 |
| 7 | -1922265216 |
| 8 | 200049877248 |
| 9 | -28532108907008 |
| 10 | 4916900759571456 |
| 11 | -987493645187344384 |
| 12 | 241526023834975735808 |
| 13 | -69201642972421758361600 |
[1,-2,12,-296,8208,-317088,22384832,-1922265216, 200049877248,-28532108907008,4916900759571456, -987493645187344384,241526023834975735808, -69201642972421758361600] |