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| n | a(n) |
|---|---|
| 1 | 125000 |
| 2 | 61298400 |
| 3 | 578869250 |
| 4 | 4511718750 |
| 5 | 195312500000 |
| 6 | 2918554687500 |
| 7 | 3874552343750 |
[125000,61298400,578869250,4511718750, 195312500000,2918554687500,3874552343750] |