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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 61 |
| 4 | 509 |
| 5 | 1019 |
| 6 | 4093 |
| 7 | 8179 |
| 8 | 524269 |
| 9 | 1048571 |
| 10 | 16777213 |
| 11 | 2596148429267413814265248164610011 |
| 12 | 1361129467683753853853498429727072845819 |
| 13 | 1427247692705959881058285969449495136382746619 |
| 14 | 1427247692705959881058285969449495136382746621 |
| 15 | 45671926166590716193865151022383844364247891937 |
[2,5,61,509,1019,4093,8179,524269,1048571, 16777213,2596148429267413814265248164610011, 1361129467683753853853498429727072845819, 1427247692705959881058285969449495136382746619, 1427247692705959881058285969449495136382746621, 45671926166590716193865151022383844364247891937] |