The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2152 |
| 3 | 122940 |
| 4 | 15828110 |
| 5 | 4174594857 |
| 6 | 2309067655254 |
| 7 | 2784288129137988 |
| 8 | 7531980120186764378 |
[81,2152,122940,15828110,4174594857,2309067655254, 2784288129137988,7531980120186764378] |