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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 1 |
| 11 | 1 |
| 12 | 2 |
| 13 | 3 |
| 14 | 5 |
| 15 | 9 |
| 16 | 16 |
| 17 | 26 |
| 18 | 44 |
| 19 | 76 |
| 20 | 131 |
| 21 | 226 |
| 22 | 393 |
| 23 | 689 |
| 24 | 1213 |
| 25 | 2147 |
| 26 | 3818 |
| 27 | 6818 |
| 28 | 12228 |
| 29 | 22012 |
| 30 | 39768 |
| 31 | 72084 |
| 32 | 131072 |
| 33 | 239027 |
| 34 | 437102 |
| 35 | 801393 |
| 36 | 1472896 |
| 37 | 2713342 |
| 38 | 5009438 |
| 39 | 9267786 |
| 40 | 17179869 |
| 41 | 31906432 |
| 42 | 59362467 |
| 43 | 110632938 |
| 44 | 206519839 |
| 45 | 386111079 |
[2,0,0,0,0,0,0,0,0,1,1,2,3,5,9,16,26,44,76,131, 226,393,689,1213,2147,3818,6818,12228,22012,39768, 72084,131072,239027,437102,801393,1472896,2713342, 5009438,9267786,17179869,31906432,59362467, 110632938,206519839,386111079] |