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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 2 |
| 7 | 0 |
| 8 | 4 |
| 9 | 1 |
| 10 | 8 |
| 11 | 12 |
| 12 | 31 |
| 13 | 30 |
| 14 | 50 |
| 15 | 84 |
| 16 | 166 |
| 17 | 240 |
| 18 | 367 |
| 19 | 560 |
| 20 | 970 |
| 21 | 1647 |
| 22 | 2736 |
| 23 | 4340 |
| 24 | 6924 |
| 25 | 11185 |
| 26 | 18334 |
| 27 | 29875 |
| 28 | 48272 |
| 29 | 77632 |
| 30 | 125262 |
| 31 | 202838 |
| 32 | 329098 |
| 33 | 533758 |
| 34 | 865248 |
| 35 | 1402099 |
| 36 | 2271831 |
| 37 | 3680202 |
| 38 | 5960113 |
| 39 | 9650231 |
| 40 | 15624475 |
| 41 | 25301422 |
| 42 | 40983324 |
| 43 | 66398800 |
[0,0,0,1,0,2,0,4,1,8,12,31,30,50,84,166,240,367, 560,970,1647,2736,4340,6924,11185,18334,29875, 48272,77632,125262,202838,329098,533758,865248, 1402099,2271831,3680202,5960113,9650231,15624475, 25301422,40983324,66398800] |