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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 25 |
| 3 | 125 |
| 4 | 15625 |
| 5 | 244140625 |
| 6 | 59604644775390625 |
| 7 | 3552713678800500929355621337890625 |
| 8 | 12621774483536188886587657044524579674771302961744368076324462890625 |
[1,5,25,125,15625,244140625,59604644775390625, 3552713678800500929355621337890625, 12621774483536188886587657044524579674771302961744\ 368076324462890625] |