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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 37 |
| 3 | 157 |
| 4 | 487 |
| 5 | 997 |
| 6 | 2557 |
| 7 | 2887 |
| 8 | 3607 |
| 9 | 6247 |
| 10 | 13687 |
| 11 | 14437 |
| 12 | 21157 |
| 13 | 24007 |
| 14 | 28087 |
| 15 | 31357 |
| 16 | 33637 |
| 17 | 34807 |
| 18 | 44887 |
| 19 | 46237 |
| 20 | 63997 |
| 21 | 90247 |
| 22 | 106087 |
| 23 | 114487 |
| 24 | 120997 |
| 25 | 132247 |
| 26 | 146407 |
| 27 | 153757 |
| 28 | 176887 |
| 29 | 184957 |
| 30 | 187687 |
| 31 | 195997 |
| 32 | 204487 |
| 33 | 210247 |
| 34 | 222007 |
[7,37,157,487,997,2557,2887,3607,6247,13687,14437, 21157,24007,28087,31357,33637,34807,44887,46237, 63997,90247,106087,114487,120997,132247,146407, 153757,176887,184957,187687,195997,204487,210247, 222007] |