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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 3 |
| 4 | 6 |
| 5 | 8 |
| 6 | 13 |
| 7 | 20 |
| 8 | 32 |
| 9 | 51 |
| 10 | 82 |
| 11 | 132 |
| 12 | 213 |
| 13 | 344 |
| 14 | 556 |
| 15 | 899 |
| 16 | 1454 |
| 17 | 2352 |
| 18 | 3805 |
| 19 | 6156 |
| 20 | 9960 |
| 21 | 16115 |
| 22 | 26074 |
| 23 | 42188 |
| 24 | 68261 |
| 25 | 110448 |
| 26 | 178708 |
| 27 | 289155 |
| 28 | 467862 |
| 29 | 757016 |
| 30 | 1224877 |
| 31 | 1981892 |
| 32 | 3206768 |
| 33 | 5188659 |
| 34 | 8395426 |
| 35 | 13584084 |
| 36 | 21979509 |
| 37 | 35563592 |
| 38 | 57543100 |
[0,4,3,6,8,13,20,32,51,82,132,213,344,556,899, 1454,2352,3805,6156,9960,16115,26074,42188,68261, 110448,178708,289155,467862,757016,1224877, 1981892,3206768,5188659,8395426,13584084,21979509, 35563592,57543100] |