The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 11 |
| 3 | 13 |
| 4 | 227 |
| 5 | 307 |
| 6 | 461 |
| 7 | 463 |
| 8 | 2609 |
| 9 | 2683 |
| 10 | 58757 |
| 11 | 58831 |
| 12 | 137777 |
| 13 | 138007 |
| 14 | 17179469033 |
| 15 | 17179470433 |
| 16 | 240518567327 |
| 17 | 240518567479 |
| 18 | 19807040628566083882989513161 |
| 19 | 19807040628566083882989513433 |
| 20 | 324478939577169594614874645075239 |
| 21 | 324478939577169594614874645093097 |
[2,3,11,13,227,307,461,463,2609,2683,58757,58831, 137777,138007,17179469033,17179470433, 240518567327,240518567479, 19807040628566083882989513161, 19807040628566083882989513433, 324478939577169594614874645075239, 324478939577169594614874645093097] |