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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 17 |
| 6 | 29 |
| 7 | 53 |
| 8 | 89 |
| 9 | 199 |
| 10 | 271 |
| 11 | 349 |
| 12 | 823 |
| 13 | 1747 |
| 14 | 2251 |
| 15 | 2593 |
| 16 | 6569 |
| 17 | 7121 |
| 18 | 27479 |
| 19 | 44129 |
| 20 | 85361 |
| 21 | 115259 |
| 22 | 254731 |
| 23 | 462103 |
| 24 | 903751 |
[2,5,7,13,17,29,53,89,199,271,349,823,1747,2251, 2593,6569,7121,27479,44129,85361,115259,254731, 462103,903751] |