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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 9 |
| 6 | 15 |
| 7 | 23 |
| 8 | 29 |
| 9 | 31 |
| 10 | 55 |
| 11 | 71 |
| 12 | 77 |
| 13 | 297 |
| 14 | 573 |
| 15 | 1301 |
| 16 | 1555 |
| 17 | 1661 |
| 18 | 4937 |
| 19 | 5579 |
| 20 | 6191 |
| 21 | 6847 |
| 22 | 6959 |
| 23 | 19985 |
| 24 | 26285 |
| 25 | 47093 |
| 26 | 74167 |
| 27 | 149039 |
| 28 | 175137 |
| 29 | 210545 |
| 30 | 240295 |
| 31 | 306153 |
| 32 | 326585 |
| 33 | 345547 |
[1,3,5,7,9,15,23,29,31,55,71,77,297,573,1301,1555, 1661,4937,5579,6191,6847,6959,19985,26285,47093, 74167,149039,175137,210545,240295,306153,326585, 345547] |