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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 19 |
| 5 | 21 |
| 6 | 31 |
| 7 | 33 |
| 8 | 39 |
| 9 | 41 |
| 10 | 49 |
| 11 | 51 |
| 12 | 59 |
| 13 | 61 |
| 14 | 71 |
| 15 | 79 |
| 16 | 93 |
| 17 | 107 |
| 18 | 119 |
| 19 | 121 |
| 20 | 123 |
| 21 | 139 |
| 22 | 147 |
| 23 | 159 |
| 24 | 169 |
| 25 | 171 |
| 26 | 177 |
| 27 | 179 |
| 28 | 181 |
| 29 | 191 |
| 30 | 197 |
| 31 | 219 |
| 32 | 233 |
| 33 | 247 |
| 34 | 253 |
| 35 | 257 |
| 36 | 263 |
| 37 | 273 |
| 38 | 281 |
| 39 | 293 |
| 40 | 343 |
| 41 | 351 |
| 42 | 359 |
| 43 | 391 |
| 44 | 417 |
| 45 | 427 |
| 46 | 439 |
| 47 | 441 |
| 48 | 449 |
| 49 | 451 |
| 50 | 459 |
| 51 | 461 |
| 52 | 489 |
| 53 | 503 |
| 54 | 517 |
| 55 | 529 |
| 56 | 531 |
[1,3,7,19,21,31,33,39,41,49,51,59,61,71,79,93,107, 119,121,123,139,147,159,169,171,177,179,181,191, 197,219,233,247,253,257,263,273,281,293,343,351, 359,391,417,427,439,441,449,451,459,461,489,503, 517,529,531] |