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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 8 |
| 5 | 9 |
| 6 | 11 |
| 7 | 15 |
| 8 | 19 |
| 9 | 29 |
| 10 | 55 |
| 11 | 76 |
| 12 | 159 |
| 13 | 266 |
| 14 | 311 |
| 15 | 394 |
| 16 | 908 |
| 17 | 1732 |
| 18 | 1875 |
| 19 | 4335 |
| 20 | 6334 |
| 21 | 7641 |
| 22 | 16421 |
| 23 | 33721 |
| 24 | 139239 |
| 25 | 157705 |
| 26 | 160143 |
[1,3,7,8,9,11,15,19,29,55,76,159,266,311,394,908, 1732,1875,4335,6334,7641,16421,33721,139239, 157705,160143] |