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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | 0 |
| 3 | 1304 |
| 4 | -109120 |
| 5 | 10816896 |
| 6 | -1441841024 |
| 7 | 258762139648 |
| 8 | -60872480247808 |
| 9 | 18224782774259712 |
| 10 | -6768839825021124608 |
| 11 | 3053776998122900160512 |
| 12 | -1644778710545416370094080 |
[1,-4,0,1304,-109120,10816896,-1441841024, 258762139648,-60872480247808,18224782774259712, -6768839825021124608,3053776998122900160512, -1644778710545416370094080] |