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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | 2 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 4 |
| 6 | 5 |
| 7 | 12 |
| 8 | 17 |
| 9 | 26 |
| 10 | 46 |
| 11 | 72 |
| 12 | 115 |
| 13 | 190 |
| 14 | 305 |
| 15 | 492 |
| 16 | 800 |
| 17 | 1292 |
| 18 | 2089 |
| 19 | 3384 |
| 20 | 5473 |
| 21 | 8854 |
| 22 | 14330 |
| 23 | 23184 |
| 24 | 37511 |
| 25 | 60698 |
| 26 | 98209 |
| 27 | 158904 |
| 28 | 257116 |
| 29 | 416020 |
| 30 | 673133 |
| 31 | 1089156 |
| 32 | 1762289 |
| 33 | 2851442 |
| 34 | 4613734 |
| 35 | 7465176 |
| 36 | 12078907 |
| 37 | 19544086 |
| 38 | 31622993 |
| 39 | 51167076 |
[-1,2,1,0,4,4,5,12,17,26,46,72,115,190,305,492, 800,1292,2089,3384,5473,8854,14330,23184,37511, 60698,98209,158904,257116,416020,673133,1089156, 1762289,2851442,4613734,7465176,12078907,19544086, 31622993,51167076] |