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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 13 |
| 6 | 23 |
| 7 | 39 |
| 8 | 67 |
| 9 | 113 |
| 10 | 191 |
| 11 | 324 |
| 12 | 548 |
| 13 | 928 |
| 14 | 1570 |
| 15 | 2657 |
| 16 | 4495 |
| 17 | 7603 |
| 18 | 12862 |
| 19 | 21758 |
| 20 | 36806 |
| 21 | 62262 |
| 22 | 105322 |
| 23 | 178163 |
| 24 | 301381 |
| 25 | 509814 |
| 26 | 862400 |
| 27 | 1458832 |
| 28 | 2467754 |
| 29 | 4174442 |
| 30 | 7061468 |
| 31 | 11945147 |
| 32 | 20206356 |
| 33 | 34180980 |
| 34 | 57820390 |
| 35 | 97808707 |
| 36 | 165452761 |
| 37 | 279879132 |
| 38 | 473442259 |
| 39 | 800872756 |
[1,1,2,4,8,13,23,39,67,113,191,324,548,928,1570, 2657,4495,7603,12862,21758,36806,62262,105322, 178163,301381,509814,862400,1458832,2467754, 4174442,7061468,11945147,20206356,34180980, 57820390,97808707,165452761,279879132,473442259, 800872756] |