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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | -88 |
| 4 | -1136 |
| 5 | 46112 |
| 6 | 1098304 |
| 7 | -103251328 |
| 8 | -1963486976 |
| 9 | 585781985792 |
| 10 | -5685626878976 |
| 11 | -6083058037577728 |
| 12 | 447306486332821504 |
| 13 | 87514624808197824512 |
| 14 | -19369074730552627675136 |
[1,2,4,-88,-1136,46112,1098304,-103251328, -1963486976,585781985792,-5685626878976, -6083058037577728,447306486332821504, 87514624808197824512,-19369074730552627675136] |