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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 69 |
| 3 | 77 |
| 4 | 93 |
| 5 | 133 |
| 6 | 141 |
| 7 | 213 |
| 8 | 237 |
| 9 | 253 |
| 10 | 301 |
| 11 | 309 |
| 12 | 341 |
| 13 | 381 |
| 14 | 413 |
| 15 | 437 |
| 16 | 453 |
| 17 | 469 |
| 18 | 501 |
| 19 | 517 |
| 20 | 573 |
| 21 | 581 |
| 22 | 589 |
| 23 | 597 |
| 24 | 669 |
| 25 | 717 |
| 26 | 749 |
| 27 | 781 |
| 28 | 789 |
| 29 | 813 |
| 30 | 869 |
| 31 | 893 |
| 32 | 917 |
| 33 | 933 |
| 34 | 973 |
| 35 | 989 |
| 36 | 1077 |
| 37 | 1101 |
| 38 | 1133 |
| 39 | 1141 |
| 40 | 1149 |
| 41 | 1253 |
| 42 | 1293 |
| 43 | 1317 |
| 44 | 1333 |
| 45 | 1349 |
| 46 | 1357 |
| 47 | 1389 |
| 48 | 1397 |
| 49 | 1437 |
| 50 | 1461 |
[21,69,77,93,133,141,213,237,253,301,309,341,381, 413,437,453,469,501,517,573,581,589,597,669,717, 749,781,789,813,869,893,917,933,973,989,1077,1101, 1133,1141,1149,1253,1293,1317,1333,1349,1357,1389, 1397,1437,1461] |