The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 1024 |
| 5 | 5621641 |
| 6 | 10188864 |
| 7 | 27657081 |
| 8 | 308950929 |
| 9 | 619113924 |
| 10 | 904265041 |
| 11 | 10011203136 |
[1,4,9,1024,5621641,10188864,27657081,308950929, 619113924,904265041,10011203136] |