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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | -3 |
| 7 | 5 |
| 8 | 25 |
| 9 | 621 |
| 10 | 385613 |
| 11 | 148697385121 |
| 12 | 22110912341822991798377 |
| 13 | 488892444587780299304228901641309659922062749 |
| 14 | 239015822375015830469277614767879892635108603674971498096787773471947363213442923403867269 |
[1,1,1,1,1,-3,5,25,621,385613,148697385121, 22110912341822991798377, 488892444587780299304228901641309659922062749, 23901582237501583046927761476787989263510860367497\ 1498096787773471947363213442923403867269] |