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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 6 |
| 9 | 10 |
| 10 | 29 |
| 11 | 39 |
| 12 | 61 |
| 13 | 101 |
| 14 | 179 |
| 15 | 335 |
| 16 | 566 |
| 17 | 928 |
| 18 | 1575 |
| 19 | 2705 |
| 20 | 4747 |
| 21 | 8117 |
| 22 | 13782 |
| 23 | 23464 |
| 24 | 40216 |
| 25 | 69209 |
| 26 | 118650 |
| 27 | 202712 |
| 28 | 346508 |
| 29 | 593180 |
| 30 | 1016874 |
| 31 | 1741871 |
| 32 | 2981190 |
| 33 | 5101520 |
| 34 | 8733466 |
| 35 | 14956519 |
| 36 | 25611753 |
| 37 | 43847283 |
| 38 | 75061015 |
| 39 | 128505176 |
[1,0,0,0,1,3,3,3,6,10,29,39,61,101,179,335,566, 928,1575,2705,4747,8117,13782,23464,40216,69209, 118650,202712,346508,593180,1016874,1741871, 2981190,5101520,8733466,14956519,25611753, 43847283,75061015,128505176] |