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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 33 |
| 3 | 1153 |
| 4 | 1331713 |
| 5 | 1773462177793 |
| 6 | 3145168096065837266706433 |
| 7 | 9892082352510403757550172975146702122837936996353 |
[5,33,1153,1331713,1773462177793, 3145168096065837266706433, 9892082352510403757550172975146702122837936996353] |