The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | -120 |
| 1 | 10260 |
| 2 | -901120 |
| 3 | 91676610 |
| 4 | -10868097024 |
| 5 | 1455225319640 |
| 6 | -213263515975680 |
| 7 | 33415165837622655 |
| 8 | -5507368816607232000 |
| 9 | 944071154093581913700 |
| 10 | -166969055816397343457280 |
| 11 | 30289678318291920442724670 |
| 12 | -5611505834651089642200760320 |
[1,-120,10260,-901120,91676610,-10868097024, 1455225319640,-213263515975680,33415165837622655, -5507368816607232000,944071154093581913700, -166969055816397343457280, 30289678318291920442724670, -5611505834651089642200760320] |