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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 17 |
| 3 | 225 |
| 4 | 19745 |
| 5 | 613889 |
| 6 | 165999025 |
| 7 | 6543673313 |
| 8 | 5318503266369 |
| 9 | 97941778159361 |
| 10 | 473023280425720657 |
| 11 | -24807619116269601823 |
| 12 | 96456947558141320688993 |
| 13 | -18191159887705677530042623 |
| 14 | 39579539155416746718880624881 |
| 15 | -15661645517509146973335115013919 |
[1,1,17,225,19745,613889,165999025,6543673313, 5318503266369,97941778159361,473023280425720657, -24807619116269601823,96456947558141320688993, -18191159887705677530042623, 39579539155416746718880624881, -15661645517509146973335115013919] |