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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 11 |
| 5 | 23 |
| 6 | 27 |
| 7 | 55 |
| 8 | 71 |
| 9 | 103 |
| 10 | 115 |
| 11 | 231 |
| 12 | 247 |
| 13 | 495 |
| 14 | 543 |
| 15 | 615 |
| 16 | 727 |
| 17 | 1455 |
| 18 | 1519 |
| 19 | 3039 |
| 20 | 3231 |
| 21 | 3615 |
| 22 | 3871 |
| 23 | 7743 |
| 24 | 7999 |
| 25 | 11167 |
| 26 | 11903 |
| 27 | 14655 |
| 28 | 15487 |
| 29 | 30951 |
| 30 | 31207 |
| 31 | 62147 |
| 32 | 69503 |
| 33 | 75765 |
| 34 | 79855 |
| 35 | 89440 |
| 36 | 91230 |
| 37 | 180285 |
| 38 | 189556 |
| 39 | 205432 |
[1,3,7,11,23,27,55,71,103,115,231,247,495,543,615, 727,1455,1519,3039,3231,3615,3871,7743,7999,11167, 11903,14655,15487,30951,31207,62147,69503,75765, 79855,89440,91230,180285,189556,205432] |