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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 159479040 |
| 8 | 36023345712 |
| 9 | 6713050656000 |
| 10 | 996444422768640 |
| 11 | 119599526889384960 |
| 12 | 11813208348266177280 |
| 13 | 973987499253055749120 |
| 14 | 67857073021007558686720 |
| 15 | 4036793565003066065373696 |
[1,0,0,0,0,0,0,159479040,36023345712, 6713050656000,996444422768640,119599526889384960, 11813208348266177280,973987499253055749120, 67857073021007558686720,4036793565003066065373696] |