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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 11 |
| 6 | 18 |
| 7 | 63 |
| 8 | 71 |
| 9 | 162 |
| 10 | 171 |
| 11 | 407 |
| 12 | 732 |
| 13 | 821 |
| 14 | 1320 |
| 15 | 1439 |
| 16 | 1607 |
| 17 | 3008 |
| 18 | 3159 |
| 19 | 10679 |
| 20 | 13376 |
| 21 | 59294 |
| 22 | 183294 |
[2,3,5,9,11,18,63,71,162,171,407,732,821,1320, 1439,1607,3008,3159,10679,13376,59294,183294] |