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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 7 |
| 6 | 10 |
| 7 | 20 |
| 8 | 29 |
| 9 | 58 |
| 10 | 83 |
| 11 | 150 |
| 12 | 230 |
| 13 | 399 |
| 14 | 605 |
| 15 | 1037 |
| 16 | 1545 |
| 17 | 2547 |
| 18 | 3879 |
| 19 | 6241 |
| 20 | 9437 |
| 21 | 15085 |
| 22 | 22622 |
| 23 | 35493 |
| 24 | 53438 |
| 25 | 82943 |
| 26 | 124157 |
| 27 | 191267 |
| 28 | 284997 |
| 29 | 434634 |
| 30 | 647437 |
| 31 | 979293 |
| 32 | 1452182 |
| 33 | 2185599 |
| 34 | 3228435 |
| 35 | 4826596 |
| 36 | 7112683 |
| 37 | 10575699 |
| 38 | 15530404 |
| 39 | 22990800 |
| 40 | 33651222 |
[0,1,1,3,3,7,10,20,29,58,83,150,230,399,605,1037, 1545,2547,3879,6241,9437,15085,22622,35493,53438, 82943,124157,191267,284997,434634,647437,979293, 1452182,2185599,3228435,4826596,7112683,10575699, 15530404,22990800,33651222] |