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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 867240 |
| 5 | 566894592 |
| 6 | 112147200000 |
| 7 | 9800853258240 |
| 8 | 470981049814440 |
| 9 | 14336837814435840 |
| 10 | 304364529554595840 |
| 11 | 4828457541834178560 |
| 12 | 60207442245584520480 |
| 13 | 613448015526239477760 |
| 14 | 5261469732373076766720 |
[1,0,0,0,867240,566894592,112147200000, 9800853258240,470981049814440,14336837814435840, 304364529554595840,4828457541834178560, 60207442245584520480,613448015526239477760, 5261469732373076766720] |