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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 6 |
| 6 | 11 |
| 7 | 15 |
| 8 | 33 |
| 9 | 49 |
| 10 | 50 |
| 11 | 52 |
| 12 | 53 |
| 13 | 54 |
| 14 | 57 |
| 15 | 60 |
| 16 | 61 |
| 17 | 64 |
| 18 | 68 |
[2,3,4,5,6,11,15,33,49,50,52,53,54,57,60,61,64,68] |