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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 53 |
| 3 | 157 |
| 4 | 173 |
| 5 | 277 |
| 6 | 373 |
| 7 | 653 |
| 8 | 677 |
| 9 | 757 |
| 10 | 797 |
| 11 | 997 |
| 12 | 1013 |
| 13 | 1093 |
| 14 | 1117 |
| 15 | 1213 |
| 16 | 1277 |
| 17 | 1453 |
| 18 | 1613 |
| 19 | 1637 |
| 20 | 1693 |
| 21 | 1733 |
| 22 | 1933 |
| 23 | 1973 |
| 24 | 2053 |
| 25 | 2213 |
| 26 | 2237 |
| 27 | 2357 |
| 28 | 2557 |
| 29 | 2677 |
| 30 | 2837 |
| 31 | 3253 |
| 32 | 3533 |
| 33 | 3613 |
| 34 | 3637 |
| 35 | 3797 |
| 36 | 3877 |
| 37 | 3917 |
| 38 | 4013 |
| 39 | 4133 |
| 40 | 4157 |
| 41 | 4397 |
| 42 | 4637 |
[13,53,157,173,277,373,653,677,757,797,997,1013, 1093,1117,1213,1277,1453,1613,1637,1693,1733,1933, 1973,2053,2213,2237,2357,2557,2677,2837,3253,3533, 3613,3637,3797,3877,3917,4013,4133,4157,4397,4637] |