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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 2 |
| 10 | 3 |
| 11 | 4 |
| 12 | 8 |
| 13 | 11 |
| 14 | 20 |
| 15 | 31 |
| 16 | 52 |
| 17 | 88 |
| 18 | 143 |
| 19 | 247 |
| 20 | 408 |
| 21 | 700 |
| 22 | 1184 |
| 23 | 2017 |
| 24 | 3462 |
| 25 | 5909 |
| 26 | 10196 |
| 27 | 17518 |
| 28 | 30281 |
| 29 | 52365 |
| 30 | 90704 |
| 31 | 157556 |
| 32 | 273742 |
| 33 | 476893 |
| 34 | 831298 |
| 35 | 1451603 |
| 36 | 2537736 |
| 37 | 4441262 |
| 38 | 7782934 |
| 39 | 13650555 |
| 40 | 23969794 |
| 41 | 42126241 |
| 42 | 74105773 |
| 43 | 130476070 |
[0,1,1,1,1,0,1,1,2,3,4,8,11,20,31,52,88,143,247, 408,700,1184,2017,3462,5909,10196,17518,30281, 52365,90704,157556,273742,476893,831298,1451603, 2537736,4441262,7782934,13650555,23969794, 42126241,74105773,130476070] |