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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 4 |
| 9 | 7 |
| 10 | 9 |
| 11 | 12 |
| 12 | 20 |
| 13 | 32 |
| 14 | 45 |
| 15 | 66 |
| 16 | 105 |
| 17 | 164 |
| 18 | 246 |
| 19 | 372 |
| 20 | 582 |
| 21 | 909 |
| 22 | 1393 |
| 23 | 2146 |
| 24 | 3355 |
| 25 | 5240 |
| 26 | 8132 |
| 27 | 12660 |
| 28 | 19825 |
| 29 | 31051 |
| 30 | 48554 |
| 31 | 76038 |
| 32 | 119409 |
| 33 | 187635 |
| 34 | 294760 |
| 35 | 463520 |
| 36 | 729980 |
| 37 | 1150296 |
| 38 | 1813100 |
| 39 | 2859948 |
| 40 | 4515225 |
| 41 | 7132412 |
[1,1,0,0,1,2,2,2,4,7,9,12,20,32,45,66,105,164,246, 372,582,909,1393,2146,3355,5240,8132,12660,19825, 31051,48554,76038,119409,187635,294760,463520, 729980,1150296,1813100,2859948,4515225,7132412] |