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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 3 |
| 9 | 6 |
| 10 | 10 |
| 11 | 17 |
| 12 | 29 |
| 13 | 50 |
| 14 | 86 |
| 15 | 147 |
| 16 | 252 |
| 17 | 432 |
| 18 | 741 |
| 19 | 1270 |
| 20 | 2177 |
| 21 | 3732 |
| 22 | 6398 |
| 23 | 10968 |
| 24 | 18802 |
| 25 | 32232 |
| 26 | 55255 |
| 27 | 94723 |
| 28 | 162382 |
| 29 | 278369 |
| 30 | 477204 |
| 31 | 818064 |
| 32 | 1402395 |
| 33 | 2404105 |
| 34 | 4121322 |
| 35 | 7065122 |
| 36 | 12111635 |
| 37 | 20762798 |
| 38 | 35593360 |
| 39 | 61017175 |
| 40 | 104600848 |
| 41 | 179315699 |
[0,0,0,0,0,1,1,2,3,6,10,17,29,50,86,147,252,432, 741,1270,2177,3732,6398,10968,18802,32232,55255, 94723,162382,278369,477204,818064,1402395,2404105, 4121322,7065122,12111635,20762798,35593360, 61017175,104600848,179315699] |