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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 27 |
| 7 | 48 |
| 8 | 82 |
| 9 | 137 |
| 10 | 225 |
| 11 | 362 |
| 12 | 572 |
| 13 | 892 |
| 14 | 1370 |
| 15 | 2078 |
| 16 | 3117 |
| 17 | 4624 |
| 18 | 6791 |
| 19 | 9885 |
| 20 | 14263 |
| 21 | 20416 |
| 22 | 29007 |
| 23 | 40921 |
| 24 | 57345 |
| 25 | 79864 |
| 26 | 110565 |
| 27 | 152211 |
| 28 | 208435 |
| 29 | 283982 |
| 30 | 385048 |
| 31 | 519695 |
| 32 | 698346 |
| 33 | 934477 |
| 34 | 1245439 |
| 35 | 1653485 |
| 36 | 2187108 |
| 37 | 2882686 |
| 38 | 3786497 |
| 39 | 4957324 |
| 40 | 6469625 |
[0,1,2,4,8,15,27,48,82,137,225,362,572,892,1370, 2078,3117,4624,6791,9885,14263,20416,29007,40921, 57345,79864,110565,152211,208435,283982,385048, 519695,698346,934477,1245439,1653485,2187108, 2882686,3786497,4957324,6469625] |