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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -12 |
| 2 | 118 |
| 3 | 168 |
| 4 | -314838 |
| 5 | 60653340 |
| 6 | -12586913250 |
| 7 | 3145598341200 |
| 8 | -959740793965230 |
| 9 | 355199264316850500 |
| 10 | -157666664319013951290 |
| 11 | 82936567630998372808440 |
| 12 | -51114833501551851944029830 |
[2,-12,118,168,-314838,60653340,-12586913250, 3145598341200,-959740793965230,355199264316850500, -157666664319013951290,82936567630998372808440, -51114833501551851944029830] |