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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 3 |
| 5 | 5 |
| 6 | 9 |
| 7 | 17 |
| 8 | 34 |
| 9 | 65 |
| 10 | 125 |
| 11 | 241 |
| 12 | 465 |
| 13 | 896 |
| 14 | 1727 |
| 15 | 3329 |
| 16 | 6417 |
| 17 | 12369 |
| 18 | 23842 |
| 19 | 45957 |
| 20 | 88585 |
| 21 | 170753 |
| 22 | 329137 |
| 23 | 634432 |
| 24 | 1222907 |
| 25 | 2357229 |
| 26 | 4543705 |
| 27 | 8758273 |
| 28 | 16882114 |
| 29 | 32541321 |
| 30 | 62725413 |
| 31 | 120907121 |
| 32 | 233055969 |
| 33 | 449229824 |
| 34 | 865918327 |
| 35 | 1669111241 |
[1,1,1,0,3,5,9,17,34,65,125,241,465,896,1727,3329, 6417,12369,23842,45957,88585,170753,329137,634432, 1222907,2357229,4543705,8758273,16882114,32541321, 62725413,120907121,233055969,449229824,865918327, 1669111241] |