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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 2 |
| 3 | 0 |
| 4 | -96 |
| 5 | 1875 |
| 6 | -32184 |
| 7 | 554631 |
| 8 | -9773056 |
| 9 | 172718325 |
| 10 | -2874200000 |
| 11 | 35973317666 |
| 12 | 218394869760 |
| 13 | -46968959184459 |
| 14 | 2890848443624064 |
| 15 | -147665402789062500 |
| 16 | 7121567693920010240 |
| 17 | -337669517265832692843 |
| 18 | 15985827659730523364352 |
| 19 | -759295252512454596032456 |
[1,-1,2,0,-96,1875,-32184,554631,-9773056, 172718325,-2874200000,35973317666,218394869760, -46968959184459,2890848443624064, -147665402789062500,7121567693920010240, -337669517265832692843,15985827659730523364352, -759295252512454596032456] |