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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 19 |
| 7 | 45 |
| 8 | 105 |
| 9 | 239 |
| 10 | 507 |
| 11 | 1079 |
| 12 | 2303 |
| 13 | 4829 |
| 14 | 10425 |
| 15 | 23263 |
| 16 | 53363 |
| 17 | 127995 |
| 18 | 318983 |
| 19 | 816057 |
| 20 | 2133241 |
| 21 | 5640135 |
| 22 | 14975051 |
| 23 | 39772751 |
| 24 | 105322879 |
| 25 | 277547989 |
| 26 | 727276225 |
| 27 | 1894282195 |
| 28 | 4903985955 |
| 29 | 12621154315 |
| 30 | 32302574959 |
| 31 | 82248961437 |
| 32 | 208426306113 |
| 33 | 525884062427 |
[1,1,1,3,7,19,45,105,239,507,1079,2303,4829,10425, 23263,53363,127995,318983,816057,2133241,5640135, 14975051,39772751,105322879,277547989,727276225, 1894282195,4903985955,12621154315,32302574959, 82248961437,208426306113,525884062427] |