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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | -36 |
| 3 | -207 |
| 4 | -2214 |
| 5 | -2754 |
| 6 | -138591 |
| 7 | 547722 |
| 8 | -3730293 |
| 9 | 30138075 |
| 10 | 133709535 |
| 11 | 7735237479 |
| 12 | -35284817430 |
| 13 | 702841889322 |
| 14 | 3056530613769 |
| 15 | 9493893988155 |
| 16 | 112554319443867 |
| 17 | 3822223052352735 |
| 18 | -3940051663965051 |
| 19 | 250298859930263181 |
| 20 | -551418001934739786 |
| 21 | 1061747224529191191 |
[1,-3,-36,-207,-2214,-2754,-138591,547722, -3730293,30138075,133709535,7735237479, -35284817430,702841889322,3056530613769, 9493893988155,112554319443867,3822223052352735, -3940051663965051,250298859930263181, -551418001934739786,1061747224529191191] |