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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 73 |
| 3 | 157 |
| 4 | 12763 |
| 5 | 255127 |
| 6 | 40952047 |
| 7 | 524287262143 |
| 8 | 41943032097151 |
| 9 | 6871947673534359738367 |
| 10 | 7036874417766335184372088831 |
| 11 | 22517998136852471125899906842623 |
| 12 | 14757395258967641292773786976294838206463 |
| 13 | 604462909807314587353087302231454903657293676543 |
[31,73,157,12763,255127,40952047,524287262143, 41943032097151,6871947673534359738367, 7036874417766335184372088831, 22517998136852471125899906842623, 14757395258967641292773786976294838206463, 604462909807314587353087302231454903657293676543] |