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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 0 |
| 9 | 21 |
| 10 | 35 |
| 11 | 91 |
| 12 | 105 |
| 13 | 211 |
| 14 | 221 |
| 15 | 464 |
| 16 | 441 |
| 17 | 740 |
| 18 | 2571 |
| 19 | 5457 |
| 20 | 14740 |
| 21 | 37990 |
| 22 | 89091 |
| 23 | 203487 |
| 24 | 416751 |
| 25 | 877183 |
| 26 | 1722277 |
| 27 | 3374384 |
| 28 | 6381902 |
| 29 | 12054327 |
| 30 | 22545335 |
| 31 | 42054605 |
| 32 | 78409434 |
| 33 | 147669414 |
| 34 | 280480248 |
| 35 | 539039384 |
| 36 | 1051964654 |
| 37 | 2078682442 |
| 38 | 4165775779 |
[1,0,0,1,0,0,21,35,91,105,211,221,464,441,740, 2571,5457,14740,37990,89091,203487,416751,877183, 1722277,3374384,6381902,12054327,22545335, 42054605,78409434,147669414,280480248,539039384, 1051964654,2078682442,4165775779] |