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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 11 |
| 5 | 31 |
| 6 | 59 |
| 7 | 127 |
| 8 | 251 |
| 9 | 377 |
| 10 | 433 |
| 11 | 1019 |
| 12 | 1969 |
| 13 | 2047 |
| 14 | 3449 |
| 15 | 4091 |
| 16 | 8191 |
| 17 | 11327 |
| 18 | 15737 |
| 19 | 16379 |
| 20 | 32689 |
| 21 | 36737 |
| 22 | 64889 |
| 23 | 65531 |
[1,3,7,11,31,59,127,251,377,433,1019,1969,2047, 3449,4091,8191,11327,15737,16379,32689,36737, 64889,65531] |