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| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 24 |
| 5 | 153 |
| 6 | 713 |
| 7 | 2557 |
| 8 | 7661 |
| 9 | 20055 |
| 10 | 47153 |
| 11 | 101821 |
| 12 | 205322 |
| 13 | 390580 |
| 14 | 707708 |
| 15 | 1229969 |
| 16 | 2060777 |
| 17 | 3344487 |
[2,24,153,713,2557,7661,20055,47153,101821,205322, 390580,707708,1229969,2060777,3344487] |