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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 3 |
| 2 | 9 |
| 3 | 17 |
| 4 | 129 |
| 5 | 2049 |
| 6 | 262145 |
| 7 | 536870913 |
| 8 | 140737488355329 |
| 9 | 75557863725914323419137 |
| 10 | 10633823966279326983230456482242756609 |
| 11 | 803469022129495137770981046170581301261101496891396417650689 |
[5,3,9,17,129,2049,262145,536870913, 140737488355329,75557863725914323419137, 10633823966279326983230456482242756609, 80346902212949513777098104617058130126110149689139\ 6417650689] |