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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | -1 |
| 4 | 37 |
| 5 | -151 |
| 6 | 5041 |
| 7 | -45277 |
| 8 | 1548457 |
| 9 | -23466079 |
| 10 | 857700181 |
| 11 | -18904086037 |
| 12 | 752753527021 |
| 13 | -21985835786383 |
| 14 | 961877988836857 |
| 15 | -34996151990315341 |
| 16 | 1686330291491184337 |
| 17 | -73237182836313686719 |
| 18 | 3882675760305075969949 |
| 19 | -195288563442324161608165 |
[1,0,1,-1,37,-151,5041,-45277,1548457,-23466079, 857700181,-18904086037,752753527021, -21985835786383,961877988836857, -34996151990315341,1686330291491184337, -73237182836313686719,3882675760305075969949, -195288563442324161608165] |