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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -2 |
| 3 | -1 |
| 4 | 4 |
| 5 | -11 |
| 6 | 116 |
| 7 | -547 |
| 8 | 960 |
| 9 | -7751 |
| 10 | 414384 |
| 11 | -3258663 |
| 12 | -6813696 |
| 13 | -390445563 |
| 14 | 9694641984 |
| 15 | -964154427 |
| 16 | 208258646016 |
| 17 | -18431412645519 |
| 18 | 207842731632384 |
| 19 | -6436900596281679 |
| 20 | -37454668211552256 |
| 21 | 834261829219880829 |
| 22 | 91517388643567641600 |
| 23 | -1149793471388581053219 |
[1,-2,-1,4,-11,116,-547,960,-7751,414384,-3258663, -6813696,-390445563,9694641984,-964154427, 208258646016,-18431412645519,207842731632384, -6436900596281679,-37454668211552256, 834261829219880829,91517388643567641600, -1149793471388581053219] |