The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 34302 |
| 4 | 60601152 |
| 5 | 281381782044 |
| 6 | 2841788674410678 |
| 7 | 54998505166544652117 |
[1,70,34302,60601152,281381782044, 2841788674410678,54998505166544652117] |