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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 9 |
| 6 | 14 |
| 7 | 23 |
| 8 | 38 |
| 9 | 64 |
| 10 | 113 |
| 11 | 200 |
| 12 | 358 |
| 13 | 653 |
| 14 | 1202 |
| 15 | 2223 |
| 16 | 4151 |
| 17 | 7781 |
| 18 | 14659 |
| 19 | 27721 |
| 20 | 52603 |
| 21 | 100084 |
| 22 | 190969 |
| 23 | 365134 |
| 24 | 699617 |
| 25 | 1342923 |
| 26 | 2582172 |
| 27 | 4972385 |
| 28 | 9588933 |
| 29 | 18515328 |
| 30 | 35794987 |
| 31 | 69278386 |
| 32 | 134224480 |
| 33 | 260309786 |
| 34 | 505302925 |
| 35 | 981723316 |
| 36 | 1908898002 |
| 37 | 3714597352 |
| 38 | 7233673969 |
| 39 | 14096361346 |
| 40 | 27487875487 |
[1,2,3,4,6,9,14,23,38,64,113,200,358,653,1202, 2223,4151,7781,14659,27721,52603,100084,190969, 365134,699617,1342923,2582172,4972385,9588933, 18515328,35794987,69278386,134224480,260309786, 505302925,981723316,1908898002,3714597352, 7233673969,14096361346,27487875487] |