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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -16 |
| 2 | 80 |
| 3 | 14464 |
| 4 | -1924352 |
| 5 | 182456320 |
| 6 | -4821633024 |
| 7 | -5022496751616 |
| 8 | 2274499602284544 |
| 9 | -641508042469015552 |
| 10 | 58440162971714846720 |
| 11 | 91048038738283980652544 |
| 12 | -93320295604487977397387264 |
[2,-16,80,14464,-1924352,182456320,-4821633024, -5022496751616,2274499602284544, -641508042469015552,58440162971714846720, 91048038738283980652544, -93320295604487977397387264] |