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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -6 |
| 2 | -38 |
| 3 | -182 |
| 4 | -7118 |
| 5 | -828102 |
| 6 | -107900726 |
| 7 | -18234006902 |
| 8 | -4075490338462 |
| 9 | -1171273052028934 |
| 10 | -420782912153339462 |
| 11 | -184761832397434030518 |
| 12 | -97361652620963092009582 |
| 13 | -60642078389254498314740166 |
[2,-6,-38,-182,-7118,-828102,-107900726, -18234006902,-4075490338462,-1171273052028934, -420782912153339462,-184761832397434030518, -97361652620963092009582, -60642078389254498314740166] |