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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -5 |
| 3 | 37 |
| 4 | -413 |
| 5 | 6421 |
| 6 | -128285 |
| 7 | 3125557 |
| 8 | -89781053 |
| 9 | 2969440021 |
| 10 | -111109062365 |
| 11 | 4639580153077 |
| 12 | -213856576973693 |
| 13 | 10784605095793621 |
| 14 | -590598038062108445 |
| 15 | 34901993971832092597 |
| 16 | -2213771863243583654333 |
| 17 | 150004882482828402563221 |
[1,1,-5,37,-413,6421,-128285,3125557,-89781053, 2969440021,-111109062365,4639580153077, -213856576973693,10784605095793621, -590598038062108445,34901993971832092597, -2213771863243583654333,150004882482828402563221] |