The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 355 |
| 4 | 838792 |
| 5 | 10177326885 |
| 6 | 502857653609080 |
| 7 | 84763676021354613990 |
| 8 | 42550449824987801797296000 |
| 9 | 57040154877904164444585301792867 |
| 10 | 186651541822247767681950912578484269400 |
[0,2,355,838792,10177326885,502857653609080, 84763676021354613990,42550449824987801797296000, 57040154877904164444585301792867, 186651541822247767681950912578484269400] |