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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 81 |
| 3 | 81225 |
| 4 | 8122515625 |
| 5 | 812251562541751472569 |
| 6 | 812251562541751472569881528811450814530084 |
[8,81,81225,8122515625,812251562541751472569, 812251562541751472569881528811450814530084] |