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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 31 |
| 5 | 31 |
| 6 | 127 |
| 7 | 127 |
| 8 | 1279 |
| 9 | 3583 |
| 10 | 5119 |
| 11 | 6143 |
| 12 | 8191 |
| 13 | 8191 |
| 14 | 81919 |
| 15 | 131071 |
| 16 | 131071 |
| 17 | 131071 |
| 18 | 524287 |
| 19 | 524287 |
| 20 | 14680063 |
| 21 | 14680063 |
| 22 | 109051903 |
| 23 | 109051903 |
| 24 | 654311423 |
| 25 | 738197503 |
| 26 | 738197503 |
| 27 | 2147483647 |
| 28 | 2147483647 |
| 29 | 2147483647 |
| 30 | 2147483647 |
[2,2,3,7,31,31,127,127,1279,3583,5119,6143,8191, 8191,81919,131071,131071,131071,524287,524287, 14680063,14680063,109051903,109051903,654311423, 738197503,738197503,2147483647,2147483647, 2147483647,2147483647] |