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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 12 |
| 5 | 23 |
| 6 | 43 |
| 7 | 79 |
| 8 | 143 |
| 9 | 256 |
| 10 | 454 |
| 11 | 799 |
| 12 | 1397 |
| 13 | 2429 |
| 14 | 4203 |
| 15 | 7242 |
| 16 | 12432 |
| 17 | 21271 |
| 18 | 36287 |
| 19 | 61739 |
| 20 | 104791 |
| 21 | 177476 |
| 22 | 299978 |
| 23 | 506111 |
| 24 | 852457 |
| 25 | 1433593 |
| 26 | 2407443 |
| 27 | 4037454 |
| 28 | 6762708 |
| 29 | 11314391 |
| 30 | 18909139 |
| 31 | 31569799 |
| 32 | 52657247 |
| 33 | 87751624 |
[1,1,3,6,12,23,43,79,143,256,454,799,1397,2429, 4203,7242,12432,21271,36287,61739,104791,177476, 299978,506111,852457,1433593,2407443,4037454, 6762708,11314391,18909139,31569799,52657247, 87751624] |