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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 10 |
| 3 | 82 |
| 4 | 2295 |
| 5 | 213800 |
| 6 | 40937523 |
| 7 | 25499216805 |
| 8 | 45685878532152 |
| 9 | 202051384124690942 |
| 10 | 2538862787057361542172 |
[2,10,82,2295,213800,40937523,25499216805, 45685878532152,202051384124690942, 2538862787057361542172] |