| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 19 |
| 7 | 39 |
| 8 | 78 |
| 9 | 157 |
| 10 | 316 |
| 11 | 629 |
| 12 | 1265 |
| 13 | 2520 |
| 14 | 5053 |
| 15 | 10135 |
| 16 | 20159 |
| 17 | 40508 |
| 18 | 80642 |
| 19 | 161701 |
| 20 | 324346 |
| 21 | 645118 |
| 22 | 1296264 |
| 23 | 2580557 |
| 24 | 5174455 |
| 25 | 10379095 |
| 26 | 20643816 |
| 27 | 41480472 |
| 28 | 82577840 |
| 29 | 165582588 |
| 30 | 332131050 |
| 31 | 660602145 |
| 32 | 1327375184 |
| 33 | 2642491049 |
| 34 | 5298643189 |
[1,1,2,4,9,19,39,78,157,316,629,1265,2520,5053, 10135,20159,40508,80642,161701,324346,645118, 1296264,2580557,5174455,10379095,20643816, 41480472,82577840,165582588,332131050,660602145, 1327375184,2642491049,5298643189] |