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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 30 |
| 2 | -2880 |
| 3 | 416640 |
| 4 | -69178110 |
| 5 | 12378401280 |
| 6 | -2321610157440 |
| 7 | 449733567736320 |
| 8 | -89200812128140800 |
| 9 | 18013245273252679710 |
| 10 | -3689479088922151082880 |
| 11 | 764375901202388789804160 |
| 12 | -159862757100127037505991680 |
| 13 | 33699694000689939789618455040 |
| 14 | -7152050326608893289997995966720 |
| 15 | 1526705794390267864554876727856640 |
[1,30,-2880,416640,-69178110,12378401280, -2321610157440,449733567736320,-89200812128140800, 18013245273252679710,-3689479088922151082880, 764375901202388789804160, -159862757100127037505991680, 33699694000689939789618455040, -7152050326608893289997995966720, 1526705794390267864554876727856640] |