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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 205 |
| 4 | 2473 |
| 5 | 475385 |
| 6 | -2814227 |
| 7 | 5900398725 |
| 8 | -532397600303 |
| 9 | 273302104270705 |
| 10 | -68724093821987755 |
| 11 | 35776180280496600509 |
| 12 | -16339748046588020242311 |
| 13 | 10552119508350355540652905 |
[1,1,5,205,2473,475385,-2814227,5900398725, -532397600303,273302104270705,-68724093821987755, 35776180280496600509,-16339748046588020242311, 10552119508350355540652905] |