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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 27 |
| 7 | 47 |
| 8 | 85 |
| 9 | 153 |
| 10 | 268 |
| 11 | 466 |
| 12 | 818 |
| 13 | 1430 |
| 14 | 2475 |
| 15 | 4273 |
| 16 | 7377 |
| 17 | 12701 |
| 18 | 21786 |
| 19 | 37282 |
| 20 | 63719 |
| 21 | 108719 |
| 22 | 185085 |
| 23 | 314537 |
| 24 | 533861 |
| 25 | 904861 |
| 26 | 1531370 |
| 27 | 2588298 |
| 28 | 4369783 |
| 29 | 7369174 |
| 30 | 12413458 |
| 31 | 20889007 |
| 32 | 35118175 |
| 33 | 58986118 |
[1,2,2,4,8,15,27,47,85,153,268,466,818,1430,2475, 4273,7377,12701,21786,37282,63719,108719,185085, 314537,533861,904861,1531370,2588298,4369783, 7369174,12413458,20889007,35118175,58986118] |