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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 8 |
| 7 | 17 |
| 8 | 25 |
| 9 | 52 |
| 10 | 83 |
| 11 | 159 |
| 12 | 271 |
| 13 | 497 |
| 14 | 868 |
| 15 | 1572 |
| 16 | 2762 |
| 17 | 4984 |
| 18 | 8784 |
| 19 | 15799 |
| 20 | 27939 |
| 21 | 50089 |
| 22 | 88831 |
| 23 | 158880 |
| 24 | 282293 |
| 25 | 504179 |
| 26 | 896780 |
| 27 | 1600335 |
| 28 | 2848339 |
| 29 | 5080363 |
| 30 | 9045953 |
| 31 | 16129172 |
| 32 | 28726972 |
| 33 | 51209648 |
| 34 | 91223508 |
| 35 | 162594868 |
| 36 | 289675121 |
| 37 | 516264093 |
[0,0,1,1,3,5,8,17,25,52,83,159,271,497,868,1572, 2762,4984,8784,15799,27939,50089,88831,158880, 282293,504179,896780,1600335,2848339,5080363, 9045953,16129172,28726972,51209648,91223508, 162594868,289675121,516264093] |