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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 22 |
| 7 | 40 |
| 8 | 66 |
| 9 | 118 |
| 10 | 192 |
| 11 | 338 |
| 12 | 546 |
| 13 | 948 |
| 14 | 1526 |
| 15 | 2618 |
| 16 | 4208 |
| 17 | 7146 |
| 18 | 11482 |
| 19 | 19332 |
| 20 | 31070 |
| 21 | 51938 |
| 22 | 83520 |
| 23 | 138786 |
| 24 | 223330 |
| 25 | 369284 |
| 26 | 594662 |
| 27 | 979306 |
| 28 | 1578064 |
| 29 | 2590138 |
| 30 | 4176394 |
| 31 | 6836164 |
| 32 | 11028942 |
| 33 | 18012562 |
[1,1,2,4,7,13,22,40,66,118,192,338,546,948,1526, 2618,4208,7146,11482,19332,31070,51938,83520, 138786,223330,369284,594662,979306,1578064, 2590138,4176394,6836164,11028942,18012562] |