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| n | a(n) |
|---|---|
| 1 | 1333331 |
| 2 | 1444441 |
| 3 | 1777771 |
| 4 | 3222223 |
| 5 | 3444443 |
| 6 | 7666667 |
| 7 | 9222229 |
| 8 | 9888889 |
| 9 | 134444413 |
| 10 | 136666613 |
| 11 | 137777713 |
| 12 | 191111119 |
| 13 | 196666619 |
| 14 | 197777719 |
| 15 | 232222223 |
| 16 | 295555529 |
| 17 | 311111131 |
| 18 | 319999931 |
| 19 | 331111133 |
| 20 | 379999937 |
| 21 | 392222239 |
| 22 | 394444439 |
[1333331,1444441,1777771,3222223,3444443,7666667, 9222229,9888889,134444413,136666613,137777713, 191111119,196666619,197777719,232222223,295555529, 311111131,319999931,331111133,379999937,392222239, 394444439] |