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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 6912 |
| 3 | 2073600 |
| 4 | 361267200 |
| 5 | 48771072000 |
| 6 | 5665247723520 |
| 7 | 595732271726592 |
| 8 | 58357447026278400 |
| 9 | 5420989989833932800 |
| 10 | 483204292920999936000 |
| 11 | 41671538221507034480640 |
| 12 | 3497929581885972295974912 |
| 13 | 287077554068924493987840000 |
| 14 | 23115688495680026711162880000 |
[0,0,6912,2073600,361267200,48771072000, 5665247723520,595732271726592,58357447026278400, 5420989989833932800,483204292920999936000, 41671538221507034480640,3497929581885972295974912, 287077554068924493987840000, 23115688495680026711162880000] |