The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 130144 |
| 3 | 293760 |
| 4 | 1705264 |
| 5 | 1977120 |
| 6 | 2201280 |
| 7 | 6082560 |
| 8 | 7012096 |
| 9 | 15467520 |
[2,130144,293760,1705264,1977120,2201280,6082560, 7012096,15467520] |