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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 2 |
| 11 | 7 |
| 12 | 16 |
| 13 | 49 |
| 14 | 118 |
| 15 | 313 |
| 16 | 764 |
| 17 | 1937 |
| 18 | 4752 |
| 19 | 11541 |
| 20 | 27610 |
| 21 | 65186 |
| 22 | 151426 |
| 23 | 346412 |
| 24 | 784064 |
[1,2,7,16,49,118,313,764,1937,4752,11541,27610, 65186,151426,346412,784064] |