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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 12 |
| 5 | 15 |
| 6 | 27 |
| 7 | 48 |
| 8 | 89 |
| 9 | 137 |
| 10 | 666 |
| 11 | 1383 |
| 12 | 1530 |
| 13 | 2102 |
| 14 | 8868 |
| 15 | 95031 |
| 16 | 111768 |
| 17 | 130200 |
| 18 | 341540 |
[2,3,8,12,15,27,48,89,137,666,1383,1530,2102,8868, 95031,111768,130200,341540] |