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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 13 |
| 4 | -1303 |
| 5 | -97351 |
| 6 | -5539667 |
| 7 | -182565627 |
| 8 | 23677748561 |
| 9 | 8153921374705 |
| 10 | 1571128609968341 |
| 11 | 190412412110488701 |
| 12 | -16146953133290647751 |
| 13 | -22882305147029329939799 |
[1,1,5,13,-1303,-97351,-5539667,-182565627, 23677748561,8153921374705,1571128609968341, 190412412110488701,-16146953133290647751, -22882305147029329939799] |