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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 13 |
| 8 | 21 |
| 9 | 48 |
| 10 | 92 |
| 11 | 239 |
| 12 | 568 |
| 13 | 1162 |
| 14 | 2995 |
| 15 | 7014 |
| 16 | 17505 |
| 17 | 44314 |
| 18 | 111919 |
| 19 | 291041 |
| 20 | 747987 |
| 21 | 1937201 |
| 22 | 5030061 |
| 23 | 13021853 |
| 24 | 33899044 |
| 25 | 88276597 |
| 26 | 229956152 |
| 27 | 600873033 |
| 28 | 1572753949 |
| 29 | 4124708368 |
| 30 | 10842119417 |
| 31 | 28553168700 |
[0,1,2,3,13,21,48,92,239,568,1162,2995,7014,17505, 44314,111919,291041,747987,1937201,5030061, 13021853,33899044,88276597,229956152,600873033, 1572753949,4124708368,10842119417,28553168700] |