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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 19 |
| 3 | 23 |
| 4 | 43 |
| 5 | 61 |
| 6 | 67 |
| 7 | 73 |
| 8 | 83 |
| 9 | 101 |
| 10 | 139 |
| 11 | 151 |
| 12 | 173 |
| 13 | 223 |
| 14 | 251 |
| 15 | 383 |
| 16 | 457 |
| 17 | 571 |
| 18 | 673 |
| 19 | 761 |
[13,19,23,43,61,67,73,83,101,139,151,173,223,251, 383,457,571,673,761] |