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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 23 |
| 3 | 67 |
| 4 | 151 |
| 5 | 487 |
| 6 | 2039 |
| 7 | 4211 |
| 8 | 524087 |
| 9 | 1046579 |
| 10 | 1073691427 |
| 11 | 1099510801043 |
| 12 | 2251799727348791 |
| 13 | 36028797132202711 |
| 14 | 4611686014335996451 |
| 15 | 36893488155919083943 |
| 16 | 147573952565445262007 |
| 17 | 604462909807989625559191 |
| 18 | 77371252455344850805618531 |
| 19 | 618970019642688992452665703 |
| 20 | 5070602400912917643802528801507 |
[11,23,67,151,487,2039,4211,524087,1046579, 1073691427,1099510801043,2251799727348791, 36028797132202711,4611686014335996451, 36893488155919083943,147573952565445262007, 604462909807989625559191, 77371252455344850805618531, 618970019642688992452665703, 5070602400912917643802528801507] |