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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | -8 |
| 4 | -4096 |
| 5 | -184064 |
| 6 | -6462336 |
| 7 | 141778176 |
| 8 | 56652931072 |
| 9 | 7990288265216 |
| 10 | 604515399630848 |
| 11 | -52091469346013184 |
| 12 | -36361552578811101184 |
| 13 | -9602033551463759937536 |
| 14 | -1234912222481784889933824 |
[1,2,8,-8,-4096,-184064,-6462336,141778176, 56652931072,7990288265216,604515399630848, -52091469346013184,-36361552578811101184, -9602033551463759937536, -1234912222481784889933824] |