The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 1212 |
| 3 | 123123 |
| 4 | 12341234 |
| 5 | 1234512345 |
| 6 | 123456123456 |
| 7 | 12345671234567 |
| 8 | 1234567812345678 |
| 9 | 123456789123456789 |
| 10 | 1234567891012345678910 |
| 11 | 12345678910111234567891011 |
| 12 | 123456789101112123456789101112 |
[11,1212,123123,12341234,1234512345,123456123456, 12345671234567,1234567812345678, 123456789123456789,1234567891012345678910, 12345678910111234567891011, 123456789101112123456789101112] |