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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 9 |
| 4 | 16 |
| 5 | 29 |
| 6 | 52 |
| 7 | 95 |
| 8 | 168 |
| 9 | 298 |
| 10 | 522 |
| 11 | 911 |
| 12 | 1580 |
| 13 | 2729 |
| 14 | 4694 |
| 15 | 8046 |
| 16 | 13748 |
| 17 | 23425 |
| 18 | 39812 |
| 19 | 67507 |
| 20 | 114228 |
| 21 | 192914 |
| 22 | 325230 |
| 23 | 547411 |
| 24 | 919996 |
| 25 | 1544029 |
| 26 | 2588002 |
| 27 | 4332630 |
| 28 | 7245208 |
| 29 | 12103013 |
| 30 | 20197972 |
| 31 | 33675911 |
| 32 | 56098560 |
| 33 | 93374074 |
| 34 | 155296914 |
[2,6,9,16,29,52,95,168,298,522,911,1580,2729,4694, 8046,13748,23425,39812,67507,114228,192914,325230, 547411,919996,1544029,2588002,4332630,7245208, 12103013,20197972,33675911,56098560,93374074, 155296914] |