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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 17 |
| 6 | 31 |
| 7 | 89 |
| 8 | 127 |
| 9 | 521 |
| 10 | 607 |
| 11 | 1279 |
| 12 | 2281 |
| 13 | 3217 |
| 14 | 4423 |
| 15 | 9689 |
| 16 | 19937 |
| 17 | 23209 |
| 18 | 44497 |
| 19 | 110503 |
| 20 | 132049 |
| 21 | 756839 |
| 22 | 859433 |
| 23 | 3021377 |
| 24 | 6972593 |
| 25 | 24036583 |
| 26 | 25964951 |
| 27 | 30402457 |
| 28 | 32582657 |
| 29 | 42643801 |
| 30 | 43112609 |
[2,3,5,7,17,31,89,127,521,607,1279,2281,3217,4423, 9689,19937,23209,44497,110503,132049,756839, 859433,3021377,6972593,24036583,25964951,30402457, 32582657,42643801,43112609] |