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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 2 |
| 8 | 5 |
| 9 | 12 |
| 10 | 28 |
| 11 | 64 |
| 12 | 143 |
| 13 | 315 |
| 14 | 687 |
| 15 | 1485 |
| 16 | 3186 |
| 17 | 6792 |
| 18 | 14401 |
| 19 | 30391 |
| 20 | 63872 |
| 21 | 133751 |
| 22 | 279177 |
| 23 | 581040 |
| 24 | 1206151 |
| 25 | 2497895 |
| 26 | 5161982 |
| 27 | 10646564 |
| 28 | 21919161 |
| 29 | 45052841 |
| 30 | 92461171 |
| 31 | 189489255 |
| 32 | 387830160 |
| 33 | 792810956 |
| 34 | 1618840800 |
| 35 | 3301999647 |
[1,2,5,12,28,64,143,315,687,1485,3186,6792,14401, 30391,63872,133751,279177,581040,1206151,2497895, 5161982,10646564,21919161,45052841,92461171, 189489255,387830160,792810956,1618840800, 3301999647] |