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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 7 |
| 6 | 8 |
| 7 | 17 |
| 8 | 26 |
| 9 | 55 |
| 10 | 89 |
| 11 | 170 |
| 12 | 298 |
| 13 | 585 |
| 14 | 1059 |
| 15 | 1988 |
| 16 | 3640 |
| 17 | 6943 |
| 18 | 12990 |
| 19 | 24469 |
| 20 | 45663 |
| 21 | 86454 |
| 22 | 163324 |
| 23 | 309092 |
| 24 | 582651 |
| 25 | 1103457 |
| 26 | 2092206 |
| 27 | 3971963 |
| 28 | 7529743 |
| 29 | 14293584 |
| 30 | 27163872 |
| 31 | 51678766 |
| 32 | 98293571 |
| 33 | 187034535 |
| 34 | 356132703 |
| 35 | 678651768 |
[2,1,3,3,7,8,17,26,55,89,170,298,585,1059,1988, 3640,6943,12990,24469,45663,86454,163324,309092, 582651,1103457,2092206,3971963,7529743,14293584, 27163872,51678766,98293571,187034535,356132703, 678651768] |