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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 2 |
| 9 | 6 |
| 10 | 14 |
| 11 | 37 |
| 12 | 88 |
| 13 | 218 |
| 14 | 515 |
| 15 | 1226 |
| 16 | 2848 |
| 17 | 6566 |
| 18 | 14997 |
| 19 | 33483 |
| 20 | 74406 |
| 21 | 162422 |
| 22 | 351621 |
| 23 | 751171 |
| 24 | 1594028 |
| 25 | 3345216 |
| 26 | 6979670 |
| 27 | 14449856 |
| 28 | 29761605 |
| 29 | 60960032 |
| 30 | 124383222 |
| 31 | 252769726 |
| 32 | 512188227 |
| 33 | 1035145462 |
| 34 | 2087540588 |
| 35 | 4202777517 |
| 36 | 8448693592 |
| 37 | 16965990536 |
| 38 | 34036224936 |
[1,2,6,14,37,88,218,515,1226,2848,6566,14997, 33483,74406,162422,351621,751171,1594028,3345216, 6979670,14449856,29761605,60960032,124383222, 252769726,512188227,1035145462,2087540588, 4202777517,8448693592,16965990536,34036224936] |