The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | 3 |
| 2 | 2 |
| 3 | 1 |
| 4 | 3 |
| 5 | 8 |
| 6 | 11 |
| 7 | 15 |
| 8 | 26 |
| 9 | 45 |
| 10 | 71 |
| 11 | 112 |
| 12 | 183 |
| 13 | 299 |
| 14 | 482 |
| 15 | 777 |
| 16 | 1259 |
| 17 | 2040 |
| 18 | 3299 |
| 19 | 5335 |
| 20 | 8634 |
| 21 | 13973 |
| 22 | 22607 |
| 23 | 36576 |
| 24 | 59183 |
| 25 | 95763 |
| 26 | 154946 |
| 27 | 250705 |
| 28 | 405651 |
| 29 | 656360 |
| 30 | 1062011 |
| 31 | 1718367 |
| 32 | 2780378 |
| 33 | 4498749 |
| 34 | 7279127 |
| 35 | 11777872 |
| 36 | 19056999 |
| 37 | 30834875 |
| 38 | 49891874 |
| 39 | 80726745 |
[-1,3,2,1,3,8,11,15,26,45,71,112,183,299,482,777, 1259,2040,3299,5335,8634,13973,22607,36576,59183, 95763,154946,250705,405651,656360,1062011,1718367, 2780378,4498749,7279127,11777872,19056999, 30834875,49891874,80726745] |