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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -3 |
| 3 | 18 |
| 4 | -429 |
| 5 | 24149 |
| 6 | -3813376 |
| 7 | 1513739413 |
| 8 | -1575456727131 |
| 9 | 4215561680804992 |
| 10 | -29321025953223722025 |
| 11 | 529210578655758192641625 |
| 12 | -24875949855198086445567836160 |
| 13 | 3047957640551011125902187378426905 |
| 14 | -974921913036976554924444728974464589255 |
[1,-3,18,-429,24149,-3813376,1513739413, -1575456727131,4215561680804992, -29321025953223722025,529210578655758192641625, -24875949855198086445567836160, 3047957640551011125902187378426905, -974921913036976554924444728974464589255] |