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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 8 |
| 3 | 8 |
| 4 | -2304 |
| 5 | -183776 |
| 6 | -15141248 |
| 7 | -1461427328 |
| 8 | -166452797440 |
| 9 | -21941424508416 |
| 10 | -3231615038191616 |
| 11 | -498564870033053696 |
| 12 | -67544768806700253184 |
| 13 | -435077810759086759936 |
| 14 | 7017404598452791761076224 |
[0,2,8,8,-2304,-183776,-15141248,-1461427328, -166452797440,-21941424508416,-3231615038191616, -498564870033053696,-67544768806700253184, -435077810759086759936,7017404598452791761076224] |