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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 7 |
| 4 | -6 |
| 5 | -117 |
| 6 | 1385 |
| 7 | -8297 |
| 8 | -25956 |
| 9 | 1648321 |
| 10 | -27076303 |
| 11 | 193866363 |
| 12 | 3316610110 |
| 13 | -155740823565 |
| 14 | 3027137980477 |
| 15 | -15561540714197 |
| 16 | -1235594001526472 |
| 17 | 54043406644859329 |
| 18 | -1102221843621842235 |
[1,-3,7,-6,-117,1385,-8297,-25956,1648321, -27076303,193866363,3316610110,-155740823565, 3027137980477,-15561540714197,-1235594001526472, 54043406644859329,-1102221843621842235] |