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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 5 |
| 3 | -37 |
| 4 | 457 |
| 5 | -8169 |
| 6 | 188685 |
| 7 | -5497741 |
| 8 | 197920145 |
| 9 | -8541537105 |
| 10 | 432381471509 |
| 11 | -25340238127989 |
| 12 | 1699894200469849 |
| 13 | -129076687233903673 |
| 14 | 10989863562589199389 |
| 15 | -1041327644107761435101 |
| 16 | 109095160722852951673633 |
| 17 | -12561989444137938396142753 |
[1,-1,5,-37,457,-8169,188685,-5497741,197920145, -8541537105,432381471509,-25340238127989, 1699894200469849,-129076687233903673, 10989863562589199389,-1041327644107761435101, 109095160722852951673633, -12561989444137938396142753] |