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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -1 |
| 3 | -20 |
| 4 | 295 |
| 5 | 871 |
| 6 | -196784 |
| 7 | 6287772 |
| 8 | 29169631 |
| 9 | -18200393741 |
| 10 | 1304183716981 |
| 11 | -27109895360074 |
| 12 | -6212943553813622 |
| 13 | 1062831339757496245 |
| 14 | -85292203894284124100 |
| 15 | -1487854700305245210924 |
| 16 | 1896933688279584387159631 |
| 17 | -377233175400513002923379973 |
[1,1,-1,-20,295,871,-196784,6287772,29169631, -18200393741,1304183716981,-27109895360074, -6212943553813622,1062831339757496245, -85292203894284124100,-1487854700305245210924, 1896933688279584387159631, -377233175400513002923379973] |