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| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 12 |
| 7 | 4 |
| 8 | 129 |
| 9 | 122 |
| 10 | 1332 |
| 11 | 960 |
| 12 | 10919 |
| 13 | 11372 |
| 14 | 132900 |
| 15 | 126396 |
| 16 | 1299851 |
| 17 | 1349784 |
[0,0,1,0,12,4,129,122,1332,960,10919,11372,132900, 126396,1299851,1349784] |