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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4567 |
| 5 | 89 |
| 6 | 10111213 |
| 7 | 1415 |
| 8 | 16171819 |
| 9 | 2021 |
| 10 | 22232425262728293031 |
| 11 | 3233 |
| 12 | 34353637 |
| 13 | 3839 |
| 14 | 40414243 |
| 15 | 4445464748495051 |
| 16 | 52535455565758596061 |
| 17 | 6263 |
| 18 | 64656667 |
| 19 | 6869 |
| 20 | 70717273747576777879 |
| 21 | 8081 |
| 22 | 82838485868788899091 |
| 23 | 9293 |
| 24 | 949596979899100101102103 |
| 25 | 104105106107 |
[1,2,3,4567,89,10111213,1415,16171819,2021, 22232425262728293031,3233,34353637,3839,40414243, 4445464748495051,52535455565758596061,6263, 64656667,6869,70717273747576777879,8081, 82838485868788899091,9293, 949596979899100101102103,104105106107] |