The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 256 |
| 5 | 972000 |
| 6 | 247669456896 |
| 7 | 6022251970560000000 |
| 8 | 18932148110851728998400000000 |
| 9 | 10036271333655026636037644353536000000000 |
| 10 | 1135547314049215265041779022180122624000000000000000000 |
| 11 | 33878761698754076709292639330840075944838638855101181276979200000000000 |
[1,3,256,972000,247669456896,6022251970560000000, 18932148110851728998400000000, 10036271333655026636037644353536000000000, 11355473140492152650417790221801226240000000000000\ 00000, 33878761698754076709292639330840075944838638855101\ 181276979200000000000] |