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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 9 |
| 5 | 111 |
| 6 | 133 |
| 7 | 135 |
| 8 | 171 |
| 9 | 331 |
| 10 | 357 |
| 11 | 535 |
| 12 | 537 |
| 13 | 553 |
| 14 | 717 |
| 15 | 735 |
| 16 | 11113 |
| 17 | 11137 |
| 18 | 11173 |
| 19 | 11371 |
| 20 | 11373 |
| 21 | 11535 |
| 22 | 11731 |
| 23 | 11911 |
| 24 | 13113 |
| 25 | 13117 |
| 26 | 13179 |
| 27 | 13317 |
| 28 | 13335 |
| 29 | 13371 |
| 30 | 13515 |
| 31 | 13533 |
| 32 | 13551 |
| 33 | 15333 |
| 34 | 15511 |
| 35 | 15531 |
| 36 | 17313 |
| 37 | 17391 |
| 38 | 17737 |
| 39 | 17913 |
| 40 | 17997 |
[1,3,7,9,111,133,135,171,331,357,535,537,553,717, 735,11113,11137,11173,11371,11373,11535,11731, 11911,13113,13117,13179,13317,13335,13371,13515, 13533,13551,15333,15511,15531,17313,17391,17737, 17913,17997] |