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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 22 |
| 7 | 41 |
| 8 | 83 |
| 9 | 169 |
| 10 | 319 |
| 11 | 627 |
| 12 | 1223 |
| 13 | 2445 |
| 14 | 4868 |
| 15 | 9638 |
| 16 | 19118 |
| 17 | 37967 |
| 18 | 75256 |
| 19 | 149528 |
| 20 | 297561 |
| 21 | 592031 |
| 22 | 1178762 |
| 23 | 2348333 |
| 24 | 4679404 |
| 25 | 9326903 |
| 26 | 18596997 |
| 27 | 37086109 |
| 28 | 73967841 |
| 29 | 147557809 |
| 30 | 294406741 |
| 31 | 587477778 |
| 32 | 1172420817 |
| 33 | 2340067090 |
| 34 | 4671002562 |
[0,0,1,3,5,11,22,41,83,169,319,627,1223,2445,4868, 9638,19118,37967,75256,149528,297561,592031, 1178762,2348333,4679404,9326903,18596997,37086109, 73967841,147557809,294406741,587477778,1172420817, 2340067090,4671002562] |