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| n | a(n) |
|---|---|
| 3 | 6 |
| 4 | 8 |
| 5 | 60 |
| 6 | 560 |
| 7 | 870899850 |
| 8 | 871017138 |
| 9 | 871017138 |
| 10 | 65473886952 |
| 11 | 65473886954 |
[6,8,60,560,870899850,871017138,871017138, 65473886952,65473886954] |