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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 10 |
| 6 | 17 |
| 7 | 24 |
| 8 | 41 |
| 9 | 58 |
| 10 | 99 |
| 11 | 140 |
| 12 | 239 |
| 13 | 338 |
| 14 | 577 |
| 15 | 816 |
| 16 | 1393 |
| 17 | 1970 |
| 18 | 3363 |
| 19 | 4756 |
| 20 | 8119 |
| 21 | 11482 |
| 22 | 19601 |
| 23 | 27720 |
| 24 | 47321 |
| 25 | 66922 |
| 26 | 114243 |
| 27 | 161564 |
| 28 | 275807 |
| 29 | 390050 |
| 30 | 665857 |
| 31 | 941664 |
| 32 | 1607521 |
| 33 | 2273378 |
| 34 | 3880899 |
| 35 | 5488420 |
| 36 | 9369319 |
| 37 | 13250218 |
| 38 | 22619537 |
| 39 | 31988856 |
| 40 | 54608393 |
[1,3,4,7,10,17,24,41,58,99,140,239,338,577,816, 1393,1970,3363,4756,8119,11482,19601,27720,47321, 66922,114243,161564,275807,390050,665857,941664, 1607521,2273378,3880899,5488420,9369319,13250218, 22619537,31988856,54608393] |