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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | -11 |
| 5 | 16 |
| 6 | 301 |
| 7 | -272 |
| 8 | -16631 |
| 9 | 7936 |
| 10 | 1620601 |
| 11 | -353792 |
| 12 | -250557251 |
| 13 | 22368256 |
| 14 | 56629836901 |
| 15 | -1903757312 |
| 16 | -17602836565871 |
| 17 | 209865342976 |
| 18 | 7193368568377201 |
| 19 | -29088885112832 |
| 20 | -3735581618747946491 |
[1,1,1,-2,-11,16,301,-272,-16631,7936,1620601, -353792,-250557251,22368256,56629836901, -1903757312,-17602836565871,209865342976, 7193368568377201,-29088885112832, -3735581618747946491] |