The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 32 |
| 4 | 90 |
| 5 | 11767 |
| 6 | 409478 |
| 7 | 266882021 |
| 8 | 218955384065 |
| 9 | 942790501392266 |
[1,2,32,90,11767,409478,266882021,218955384065, 942790501392266] |