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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 11 |
| 6 | 39 |
| 7 | 114 |
| 8 | 303 |
| 9 | 759 |
| 10 | 1823 |
| 11 | 4260 |
| 12 | 9751 |
| 13 | 21965 |
| 14 | 48860 |
| 15 | 107580 |
| 16 | 234885 |
| 17 | 509223 |
| 18 | 1097356 |
| 19 | 2352534 |
| 20 | 5020718 |
| 21 | 10672737 |
| 22 | 22608081 |
| 23 | 47741381 |
| 24 | 100533203 |
| 25 | 211167291 |
| 26 | 442536359 |
| 27 | 925476274 |
| 28 | 1931759668 |
| 29 | 4025133578 |
| 30 | 8373495648 |
| 31 | 17393448283 |
| 32 | 36079810546 |
[1,0,1,1,1,11,39,114,303,759,1823,4260,9751,21965, 48860,107580,234885,509223,1097356,2352534, 5020718,10672737,22608081,47741381,100533203, 211167291,442536359,925476274,1931759668, 4025133578,8373495648,17393448283,36079810546] |