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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -5 |
| 2 | 65 |
| 3 | -2221 |
| 4 | 119873 |
| 5 | -9786229 |
| 6 | 1171166529 |
| 7 | -194493711517 |
| 8 | 42939774236801 |
| 9 | -12195226930738277 |
| 10 | 4336542878659585857 |
| 11 | -1888009822588324263693 |
| 12 | 987916087242245073188545 |
[1,-5,65,-2221,119873,-9786229,1171166529, -194493711517,42939774236801,-12195226930738277, 4336542878659585857,-1888009822588324263693, 987916087242245073188545] |