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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 66 |
| 3 | 6216 |
| 4 | 617716 |
| 5 | 61732716 |
| 6 | 6172882716 |
| 7 | 617284382716 |
| 8 | 61728399382716 |
[1,66,6216,617716,61732716,6172882716, 617284382716,61728399382716] |