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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 17 |
| 3 | 257 |
| 4 | 1297 |
| 5 | 65537 |
| 6 | 160001 |
| 7 | 331777 |
| 8 | 614657 |
| 9 | 1336337 |
| 10 | 4477457 |
| 11 | 5308417 |
| 12 | 8503057 |
| 13 | 9834497 |
| 14 | 29986577 |
| 15 | 40960001 |
| 16 | 45212177 |
| 17 | 59969537 |
| 18 | 65610001 |
| 19 | 126247697 |
| 20 | 193877777 |
| 21 | 303595777 |
| 22 | 384160001 |
| 23 | 406586897 |
| 24 | 562448657 |
| 25 | 655360001 |
[2,17,257,1297,65537,160001,331777,614657,1336337, 4477457,5308417,8503057,9834497,29986577,40960001, 45212177,59969537,65610001,126247697,193877777, 303595777,384160001,406586897,562448657,655360001] |