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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 17 |
| 4 | 83 |
| 5 | 167 |
| 6 | 583 |
| 7 | 1833 |
| 8 | 8167 |
| 9 | 10583 |
| 10 | 41833 |
| 11 | 191833 |
| 12 | 489417 |
| 13 | 1989417 |
| 14 | 9958167 |
| 15 | 25041833 |
| 16 | 74958167 |
| 17 | 125041833 |
| 18 | 831989417 |
| 19 | 1625041833 |
| 20 | 9874958167 |
| 21 | 15831989417 |
| 22 | 65831989417 |
| 23 | 309874958167 |
| 24 | 834168010583 |
| 25 | 1809874958167 |
| 26 | 6809874958167 |
| 27 | 29165831989417 |
| 28 | 51809874958167 |
| 29 | 179165831989417 |
[3,7,17,83,167,583,1833,8167,10583,41833,191833, 489417,1989417,9958167,25041833,74958167, 125041833,831989417,1625041833,9874958167, 15831989417,65831989417,309874958167,834168010583, 1809874958167,6809874958167,29165831989417, 51809874958167,179165831989417] |