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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -2 |
| 3 | 15 |
| 4 | -224 |
| 5 | 6945 |
| 6 | -437534 |
| 7 | 55566819 |
| 8 | -14169538844 |
| 9 | 7240634349285 |
| 10 | -7407168939318554 |
| 11 | 15162474818785080039 |
| 12 | -62090334382924902759704 |
| 13 | 508581928930537878504735465 |
| 14 | -8332097741669002063543081123094 |
[0,1,-2,15,-224,6945,-437534,55566819, -14169538844,7240634349285,-7407168939318554, 15162474818785080039,-62090334382924902759704, 508581928930537878504735465, -8332097741669002063543081123094] |