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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 13 |
| 3 | 19 |
| 4 | 37 |
| 5 | 73 |
| 6 | 97 |
| 7 | 109 |
| 8 | 163 |
| 9 | 193 |
| 10 | 369 |
| 11 | 433 |
| 12 | 487 |
| 13 | 577 |
| 14 | 769 |
| 15 | 1153 |
| 16 | 1297 |
| 17 | 1459 |
| 18 | 2593 |
| 19 | 2917 |
| 20 | 3457 |
| 21 | 3889 |
| 22 | 10369 |
| 23 | 12289 |
| 24 | 17497 |
| 25 | 18433 |
| 26 | 39367 |
| 27 | 52489 |
| 28 | 139969 |
| 29 | 147457 |
| 30 | 209953 |
| 31 | 331777 |
| 32 | 472393 |
| 33 | 629857 |
| 34 | 746497 |
| 35 | 786433 |
| 36 | 839809 |
| 37 | 995329 |
| 38 | 1179649 |
| 39 | 1492993 |
| 40 | 1769473 |
[7,13,19,37,73,97,109,163,193,369,433,487,577,769, 1153,1297,1459,2593,2917,3457,3889,10369,12289, 17497,18433,39367,52489,139969,147457,209953, 331777,472393,629857,746497,786433,839809,995329, 1179649,1492993,1769473] |