The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | -10 |
| 4 | -840 |
| 5 | -87750 |
| 6 | -12310100 |
| 7 | -2287605450 |
| 8 | -549013374000 |
| 9 | -166031512396750 |
| 10 | -61922192590147500 |
| 11 | -27960041702488691250 |
| 12 | -15045975711682274645000 |
| 13 | -9519627048988069071093750 |
[1,0,0,-10,-840,-87750,-12310100,-2287605450, -549013374000,-166031512396750,-61922192590147500, -27960041702488691250,-15045975711682274645000, -9519627048988069071093750] |