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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | -300 |
| 5 | 105050 |
| 6 | -35927100 |
| 7 | 12328144851 |
| 8 | -4228301370600 |
| 9 | 1450319733570100 |
| 10 | -497459062806004200 |
| 11 | 170628488227082949701 |
| 12 | -58525570007342935110900 |
| 13 | 20074270583791406305395150 |
| 14 | -6885474806748086165925231300 |
[1,-300,105050,-35927100,12328144851, -4228301370600,1450319733570100, -497459062806004200,170628488227082949701, -58525570007342935110900, 20074270583791406305395150, -6885474806748086165925231300] |