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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -8 |
| 3 | -112 |
| 4 | 2176 |
| 5 | 71936 |
| 6 | -3163136 |
| 7 | -196237312 |
| 8 | 15258124288 |
| 9 | 1531746516992 |
| 10 | -185088737017856 |
| 11 | -27405687884087296 |
| 12 | 4747122204712370176 |
| 13 | 973473732763710390272 |
| 14 | -228670532983871365971968 |
| 15 | -62056343388674412796444672 |
| 16 | 18982531521384459634512756736 |
[1,2,-8,-112,2176,71936,-3163136,-196237312, 15258124288,1531746516992,-185088737017856, -27405687884087296,4747122204712370176, 973473732763710390272,-228670532983871365971968, -62056343388674412796444672, 18982531521384459634512756736] |