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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 15 |
| 3 | 21 |
| 4 | 44 |
| 5 | 58 |
| 6 | 64 |
| 7 | 96 |
| 8 | 108 |
| 9 | 138 |
| 10 | 160 |
| 11 | 222 |
| 12 | 534 |
| 13 | 2060 |
| 14 | 2446 |
| 15 | 3884 |
| 16 | 8794 |
| 17 | 9879 |
| 18 | 18303 |
[9,15,21,44,58,64,96,108,138,160,222,534,2060, 2446,3884,8794,9879,18303] |