The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -48 |
| 2 | -196128 |
| 3 | -33542976 |
| 4 | -678319104 |
| 5 | 12136422240 |
| 6 | 509314518144 |
| 7 | 7469015889792 |
| 8 | 68272650653760 |
| 9 | 458377820557584 |
| 10 | 2454769903187520 |
| 11 | 11035857376010304 |
| 12 | 43103740076823552 |
| 13 | 149954656815201504 |
| 14 | 473331019057949952 |
| 15 | 1375248429330791040 |
| 16 | 3719662610125117632 |
[1,-48,-196128,-33542976,-678319104,12136422240, 509314518144,7469015889792,68272650653760, 458377820557584,2454769903187520, 11035857376010304,43103740076823552, 149954656815201504,473331019057949952, 1375248429330791040,3719662610125117632] |