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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 31 |
| 4 | 318 |
| 5 | 31817 |
| 6 | 3181548 |
| 7 | 3181530396 |
| 8 | 3181528335091 |
| 9 | 31815281031585777 |
| 10 | 31815281005815399552 |
| 11 | 318152810055319253966698 |
| 12 | 3181528100552883295133046294 |
| 13 | 318152810055287994498392866979206 |
[3,3,31,318,31817,3181548,3181530396, 3181528335091,31815281031585777, 31815281005815399552,318152810055319253966698, 3181528100552883295133046294, 318152810055287994498392866979206] |