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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 13 |
| 5 | 17 |
| 6 | 19 |
| 7 | 43 |
| 8 | 67 |
| 9 | 103 |
| 10 | 131 |
| 11 | 241 |
| 12 | 257 |
| 13 | 683 |
| 14 | 2731 |
| 15 | 4099 |
| 16 | 32771 |
| 17 | 43691 |
| 18 | 61681 |
| 19 | 65537 |
| 20 | 65539 |
| 21 | 174763 |
| 22 | 262147 |
| 23 | 2796203 |
| 24 | 6710887 |
| 25 | 15790321 |
[3,5,11,13,17,19,43,67,103,131,241,257,683,2731, 4099,32771,43691,61681,65537,65539,174763,262147, 2796203,6710887,15790321] |