The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1560 |
| 7 | 0 |
| 8 | 34000 |
| 9 | 175104 |
| 10 | 0 |
| 11 | 22417824 |
| 12 | 313235960 |
| 13 | 0 |
| 14 | 83574857328 |
| 15 | 1729671003296 |
[0,0,0,0,0,0,1560,0,34000,175104,0,22417824, 313235960,0,83574857328,1729671003296] |