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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -12 |
| 2 | 478 |
| 3 | -30072 |
| 4 | 3540762 |
| 5 | -612942660 |
| 6 | 152039588790 |
| 7 | -50468748044400 |
| 8 | 21718174357721010 |
| 9 | -11738352932289531900 |
| 10 | 7790876172172937111310 |
| 11 | -6228079669260433576829160 |
| 12 | 5903220687917269513392843210 |
[2,-12,478,-30072,3540762,-612942660,152039588790, -50468748044400,21718174357721010, -11738352932289531900,7790876172172937111310, -6228079669260433576829160, 5903220687917269513392843210] |