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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 727 |
| 3 | 757 |
| 4 | 787 |
| 5 | 797 |
| 6 | 70207 |
| 7 | 70507 |
| 8 | 70607 |
| 9 | 71317 |
| 10 | 71917 |
| 11 | 72227 |
| 12 | 72727 |
| 13 | 73037 |
| 14 | 73237 |
| 15 | 73637 |
| 16 | 74047 |
| 17 | 74747 |
| 18 | 75557 |
| 19 | 76367 |
| 20 | 76667 |
| 21 | 77377 |
| 22 | 77477 |
| 23 | 77977 |
| 24 | 78487 |
| 25 | 78787 |
| 26 | 78887 |
| 27 | 79397 |
| 28 | 79697 |
| 29 | 79997 |
| 30 | 7014107 |
| 31 | 7035307 |
| 32 | 7036307 |
| 33 | 7041407 |
| 34 | 7046407 |
| 35 | 7057507 |
| 36 | 7065607 |
| 37 | 7069607 |
[7,727,757,787,797,70207,70507,70607,71317,71917, 72227,72727,73037,73237,73637,74047,74747,75557, 76367,76667,77377,77477,77977,78487,78787,78887, 79397,79697,79997,7014107,7035307,7036307,7041407, 7046407,7057507,7065607,7069607] |