The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 5 |
| 4 | 25 |
| 5 | 625 |
| 6 | 390625 |
| 7 | 152587890625 |
| 8 | 23283064365386962890625 |
| 9 | 542101086242752217003726400434970855712890625 |
[1,5,5,25,625,390625,152587890625, 23283064365386962890625, 542101086242752217003726400434970855712890625] |