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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 8 |
| 8 | 16 |
| 9 | 29 |
| 10 | 53 |
| 11 | 98 |
| 12 | 180 |
| 13 | 331 |
| 14 | 609 |
| 15 | 1120 |
| 16 | 2240 |
| 17 | 4300 |
| 18 | 8269 |
| 19 | 15929 |
| 20 | 30738 |
| 21 | 59236 |
| 22 | 114172 |
| 23 | 220075 |
| 24 | 424221 |
| 25 | 817704 |
| 26 | 1576172 |
| 27 | 3038172 |
| 28 | 5856269 |
| 29 | 11288317 |
| 30 | 21758930 |
| 31 | 41941688 |
| 32 | 83883376 |
| 33 | 164728580 |
| 34 | 323600891 |
| 35 | 635913465 |
| 36 | 1250068000 |
| 37 | 2458194312 |
| 38 | 4832505248 |
| 39 | 9500281916 |
[1,1,1,2,3,5,8,16,29,53,98,180,331,609,1120,2240, 4300,8269,15929,30738,59236,114172,220075,424221, 817704,1576172,3038172,5856269,11288317,21758930, 41941688,83883376,164728580,323600891,635913465, 1250068000,2458194312,4832505248,9500281916] |