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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 66 |
| 3 | 666 |
| 4 | 476776 |
| 5 | 764466 |
| 6 | 4646676 |
| 7 | 464774774646 |
| 8 | 667474767766464747666467446 |
| 9 | 7666777767444444644744476476 |
| 10 | 44774674766666676747766477446 |
[6,66,666,476776,764466,4646676,464774774646, 667474767766464747666467446, 7666777767444444644744476476, 44774674766666676747766477446] |