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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 17 |
| 5 | 18 |
| 6 | 93 |
| 7 | 189 |
| 8 | 1335 |
| 9 | 1341 |
| 10 | 4033 |
| 11 | 4038 |
| 12 | 44448 |
| 13 | 44463 |
| 14 | 578124 |
| 15 | 1156353 |
| 16 | 1156409 |
| 17 | 1156437 |
| 18 | 19659681 |
| 19 | 19659807 |
| 20 | 373537593 |
| 21 | 373538223 |
| 22 | 373538553 |
| 23 | 373538718 |
| 24 | 8591392494 |
| 25 | 8591393484 |
| 26 | 42956969994 |
| 27 | 42956971281 |
| 28 | 128870915845 |
| 29 | 128870916846 |
[1,2,5,17,18,93,189,1335,1341,4033,4038,44448, 44463,578124,1156353,1156409,1156437,19659681, 19659807,373537593,373538223,373538553,373538718, 8591392494,8591393484,42956969994,42956971281, 128870915845,128870916846] |