The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 3168 |
| 3 | 1663776 |
| 4 | 584685312 |
| 5 | 268219092816 |
| 6 | 117214929608832 |
| 7 | 54637244971358016 |
| 8 | 25574598700199847936 |
| 9 | 12238100148358426410360 |
| 10 | 5910293921259795914011968 |
| 11 | 2885917219371433467109558368 |
| 12 | 1419817980186833008095972357120 |
[1,24,3168,1663776,584685312,268219092816, 117214929608832,54637244971358016, 25574598700199847936,12238100148358426410360, 5910293921259795914011968, 2885917219371433467109558368, 1419817980186833008095972357120] |