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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 5 |
| 2 | 17 |
| 3 | 257 |
| 4 | 65537 |
| 5 | 43969786939269621239851427694879659964972193373572605276547046131629468448105886917662485986957414531083768961 |
[3,5,17,257,65537, 43969786939269621239851427694879659964972193373572\ 60527654704613162946844810588691766248598695741453\ 1083768961] |