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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 23 |
| 5 | 41 |
| 6 | 79 |
| 7 | 89 |
| 8 | 97 |
| 9 | 127 |
| 10 | 167 |
| 11 | 191 |
| 12 | 223 |
| 13 | 239 |
| 14 | 241 |
| 15 | 257 |
| 16 | 281 |
| 17 | 439 |
| 18 | 577 |
| 19 | 593 |
[1,4,7,23,41,79,89,97,127,167,191,223,239,241,257, 281,439,577,593] |