The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 90 |
| 2 | 4672 |
| 3 | 116992 |
| 4 | 2040832 |
| 5 | 535969792 |
| 6 | 2198965583872 |
| 7 | 2417851639168785209884672 |
[90,4672,116992,2040832,535969792,2198965583872, 2417851639168785209884672] |