The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | -560 |
| 5 | 50400 |
| 6 | -4403520 |
| 7 | 451651200 |
| 8 | -55603258880 |
| 9 | 8098495142400 |
| 10 | -1364657183216640 |
| 11 | 258905686980864000 |
| 12 | -53203592135631564800 |
| 13 | 11000355030582368256000 |
| 14 | -1812425415209721012879360 |
[1,0,0,0,-560,50400,-4403520,451651200, -55603258880,8098495142400,-1364657183216640, 258905686980864000,-53203592135631564800, 11000355030582368256000, -1812425415209721012879360] |