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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 31 |
| 5 | 61 |
| 6 | 103 |
| 7 | 157 |
| 8 | 173 |
| 9 | 181 |
| 10 | 193 |
| 11 | 211 |
| 12 | 223 |
| 13 | 239 |
| 14 | 269 |
| 15 | 313 |
| 16 | 337 |
| 17 | 353 |
| 18 | 419 |
| 19 | 487 |
| 20 | 499 |
| 21 | 577 |
| 22 | 613 |
| 23 | 631 |
| 24 | 647 |
| 25 | 677 |
| 26 | 709 |
| 27 | 727 |
| 28 | 827 |
| 29 | 857 |
| 30 | 947 |
| 31 | 1039 |
| 32 | 1093 |
| 33 | 1117 |
| 34 | 1231 |
| 35 | 1283 |
| 36 | 1303 |
| 37 | 1319 |
| 38 | 1483 |
| 39 | 1499 |
| 40 | 1553 |
| 41 | 1609 |
| 42 | 1627 |
| 43 | 1657 |
| 44 | 1693 |
| 45 | 1721 |
| 46 | 1733 |
| 47 | 1823 |
| 48 | 1913 |
| 49 | 1933 |
| 50 | 1951 |
| 51 | 2003 |
| 52 | 2027 |
| 53 | 2039 |
| 54 | 2129 |
| 55 | 2161 |
| 56 | 2203 |
[2,5,13,31,61,103,157,173,181,193,211,223,239,269, 313,337,353,419,487,499,577,613,631,647,677,709, 727,827,857,947,1039,1093,1117,1231,1283,1303, 1319,1483,1499,1553,1609,1627,1657,1693,1721,1733, 1823,1913,1933,1951,2003,2027,2039,2129,2161,2203] |