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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 127 |
| 3 | 1093 |
| 4 | 2801 |
| 5 | 8191 |
| 6 | 19531 |
| 7 | 30941 |
| 8 | 131071 |
| 9 | 88741 |
| 10 | 524287 |
| 11 | 292561 |
| 12 | 797161 |
| 13 | 732541 |
| 14 | 3500201 |
| 15 | 5229043 |
| 16 | 12207031 |
| 17 | 25646167 |
| 18 | 28792661 |
| 19 | 39449441 |
| 20 | 48037081 |
| 21 | 305175781 |
| 22 | 262209281 |
| 23 | 917087137 |
| 24 | 2147483647 |
| 25 | 1394714501 |
| 26 | 2666986681 |
[31,127,1093,2801,8191,19531,30941,131071,88741, 524287,292561,797161,732541,3500201,5229043, 12207031,25646167,28792661,39449441,48037081, 305175781,262209281,917087137,2147483647, 1394714501,2666986681] |