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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | 1 |
| 6 | 6 |
| 7 | 6 |
| 8 | 11 |
| 9 | 21 |
| 10 | 24 |
| 11 | 57 |
| 12 | 66 |
| 13 | 138 |
| 14 | 194 |
| 15 | 330 |
| 16 | 546 |
| 17 | 827 |
| 18 | 1452 |
| 19 | 2175 |
| 20 | 3739 |
| 21 | 5826 |
| 22 | 9582 |
| 23 | 15519 |
| 24 | 24807 |
| 25 | 40836 |
| 26 | 64933 |
| 27 | 106584 |
| 28 | 170796 |
| 29 | 277696 |
| 30 | 448980 |
| 31 | 724968 |
| 32 | 1177181 |
| 33 | 1897380 |
| 34 | 3080367 |
| 35 | 4972113 |
| 36 | 8055918 |
| 37 | 13029534 |
| 38 | 21075947 |
| 39 | 34125561 |
| 40 | 55169988 |
[0,0,1,0,3,1,6,6,11,21,24,57,66,138,194,330,546, 827,1452,2175,3739,5826,9582,15519,24807,40836, 64933,106584,170796,277696,448980,724968,1177181, 1897380,3080367,4972113,8055918,13029534,21075947, 34125561,55169988] |