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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 24 |
| 6 | 42 |
| 7 | 75 |
| 8 | 138 |
| 9 | 255 |
| 10 | 476 |
| 11 | 894 |
| 12 | 1690 |
| 13 | 3217 |
| 14 | 6149 |
| 15 | 11805 |
| 16 | 22732 |
| 17 | 43897 |
| 18 | 84977 |
| 19 | 164835 |
| 20 | 320346 |
| 21 | 623556 |
| 22 | 1215518 |
| 23 | 2372496 |
| 24 | 4636086 |
| 25 | 9068943 |
| 26 | 17757267 |
| 27 | 34799853 |
| 28 | 68254019 |
| 29 | 133968219 |
| 30 | 263132327 |
| 31 | 517158572 |
| 32 | 1017024736 |
| 33 | 2001152416 |
[1,2,4,8,14,24,42,75,138,255,476,894,1690,3217, 6149,11805,22732,43897,84977,164835,320346,623556, 1215518,2372496,4636086,9068943,17757267,34799853, 68254019,133968219,263132327,517158572,1017024736, 2001152416] |