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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 7 |
| 4 | 85 |
| 5 | 341 |
| 6 | 455 |
| 7 | 5461 |
| 8 | 21845 |
| 9 | 9709 |
| 10 | 349525 |
| 11 | 1398101 |
| 12 | 1864135 |
| 13 | 22369621 |
| 14 | 89478485 |
| 15 | 119304647 |
| 16 | 1431655765 |
| 17 | 5726623061 |
| 18 | 2545165805 |
| 19 | 91625968981 |
| 20 | 366503875925 |
| 21 | 488671834567 |
| 22 | 5864062014805 |
| 23 | 23456248059221 |
| 24 | 31274997412295 |
| 25 | 375299968947541 |
| 26 | 15011998757901653 |
[1,5,7,85,341,455,5461,21845,9709,349525,1398101, 1864135,22369621,89478485,119304647,1431655765, 5726623061,2545165805,91625968981,366503875925, 488671834567,5864062014805,23456248059221, 31274997412295,375299968947541,15011998757901653] |