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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 8 |
| 8 | 13 |
| 9 | 22 |
| 10 | 39 |
| 11 | 77 |
| 12 | 137 |
| 13 | 254 |
| 14 | 459 |
| 15 | 889 |
| 16 | 1665 |
| 17 | 3175 |
| 18 | 6041 |
| 19 | 11619 |
| 20 | 22319 |
| 21 | 42979 |
| 22 | 83123 |
| 23 | 160649 |
| 24 | 311826 |
| 25 | 605225 |
| 26 | 1176998 |
| 27 | 2291702 |
| 28 | 4466923 |
| 29 | 8716126 |
| 30 | 17023771 |
| 31 | 33279942 |
| 32 | 65109458 |
| 33 | 127484313 |
| 34 | 249783733 |
| 35 | 489738130 |
| 36 | 960801221 |
| 37 | 1886039740 |
[1,1,0,1,2,2,4,8,13,22,39,77,137,254,459,889,1665, 3175,6041,11619,22319,42979,83123,160649,311826, 605225,1176998,2291702,4466923,8716126,17023771, 33279942,65109458,127484313,249783733,489738130, 960801221,1886039740] |