The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -3 |
| 3 | -27 |
| 4 | 1145 |
| 5 | -8631 |
| 6 | -1770123 |
| 7 | 115778861 |
| 8 | 4625206001 |
| 9 | -1652588042607 |
| 10 | 75500754980077 |
| 11 | 36232528294816885 |
| 12 | -8153373987817082007 |
| 13 | -655897923302322394919 |
| 14 | 753704651365381460774501 |
[1,1,-3,-27,1145,-8631,-1770123,115778861, 4625206001,-1652588042607,75500754980077, 36232528294816885,-8153373987817082007, -655897923302322394919,753704651365381460774501] |