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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 66 |
| 3 | 666 |
| 4 | 677766969666676 |
| 5 | 66799696699976679697696799766996696 |
[6,66,666,677766969666676, 66799696699976679697696799766996696] |