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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -2 |
| 3 | -7 |
| 4 | -11 |
| 5 | -43 |
| 6 | -65 |
| 7 | -259 |
| 8 | -146 |
| 9 | -1798 |
| 10 | 826 |
| 11 | -8116 |
| 12 | 17593 |
| 13 | -35089 |
| 14 | 301903 |
| 15 | -308464 |
| 16 | 3582403 |
| 17 | 157367 |
| 18 | 28816009 |
| 19 | 9388694 |
| 20 | 329375419 |
| 21 | -61352008 |
| 22 | 2991009094 |
| 23 | 509592773 |
| 24 | 23675224255 |
| 25 | 1207374806 |
| 26 | 229200996508 |
| 27 | -129896994130 |
| 28 | 2090952547882 |
| 29 | -816324790165 |
| 30 | 14079091274800 |
[1,-1,-2,-7,-11,-43,-65,-259,-146,-1798,826,-8116, 17593,-35089,301903,-308464,3582403,157367, 28816009,9388694,329375419,-61352008,2991009094, 509592773,23675224255,1207374806,229200996508, -129896994130,2090952547882,-816324790165, 14079091274800] |