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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 6 |
| 7 | 10 |
| 8 | 16 |
| 9 | 27 |
| 10 | 44 |
| 11 | 71 |
| 12 | 115 |
| 13 | 186 |
| 14 | 301 |
| 15 | 488 |
| 16 | 789 |
| 17 | 1277 |
| 18 | 2067 |
| 19 | 3344 |
| 20 | 5412 |
| 21 | 8756 |
| 22 | 14168 |
| 23 | 22925 |
| 24 | 37094 |
| 25 | 60020 |
| 26 | 97114 |
| 27 | 157134 |
| 28 | 254248 |
| 29 | 411383 |
| 30 | 665632 |
| 31 | 1077015 |
| 32 | 1742647 |
| 33 | 2819662 |
| 34 | 4562309 |
| 35 | 7381972 |
| 36 | 11944281 |
| 37 | 19326253 |
| 38 | 31270535 |
| 39 | 50596788 |
| 40 | 81867324 |
[0,0,0,1,2,4,6,10,16,27,44,71,115,186,301,488,789, 1277,2067,3344,5412,8756,14168,22925,37094,60020, 97114,157134,254248,411383,665632,1077015,1742647, 2819662,4562309,7381972,11944281,19326253, 31270535,50596788,81867324] |