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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | -3 |
| 5 | 10 |
| 6 | -100 |
| 7 | 693 |
| 8 | -5803 |
| 9 | 52092 |
| 10 | -505734 |
| 11 | 5365195 |
| 12 | -61255579 |
| 13 | 754182702 |
| 14 | -9947852044 |
| 15 | 140160046635 |
| 16 | -2101501505751 |
| 17 | 33422099566552 |
| 18 | -562127778341242 |
| 19 | 9970641912040443 |
| 20 | -186034070549967727 |
[1,0,0,0,-3,10,-100,693,-5803,52092,-505734, 5365195,-61255579,754182702,-9947852044, 140160046635,-2101501505751,33422099566552, -562127778341242,9970641912040443, -186034070549967727] |