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| n | a(n) |
|---|---|
| 0 | 7 |
| 1 | 63 |
| 2 | 4095 |
| 3 | 16777215 |
| 4 | 281474976710655 |
| 5 | 79228162514264337593543950335 |
| 6 | 6277101735386680763835789423207666416102355444464034512895 |
| 7 | 39402006196394479212279040100143613805079739270465446667948293404245721771497210611414266254884915640806627990306815 |
[7,63,4095,16777215,281474976710655, 79228162514264337593543950335, 62771017353866807638357894232076664161023554444640\ 34512895, 39402006196394479212279040100143613805079739270465\ 44666794829340424572177149721061141426625488491564\ 0806627990306815] |