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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -2 |
| 3 | 11 |
| 4 | -96 |
| 5 | 1137 |
| 6 | -16972 |
| 7 | 305653 |
| 8 | -6449876 |
| 9 | 156135481 |
| 10 | -4266372138 |
| 11 | 129918213186 |
| 12 | -4363433172488 |
| 13 | 160251326396727 |
| 14 | -6389255111157990 |
| 15 | 274851082201092530 |
| 16 | -12689236310679318864 |
| 17 | 625827924636908620381 |
| 18 | -32839089116018960634852 |
[1,1,-2,11,-96,1137,-16972,305653,-6449876, 156135481,-4266372138,129918213186,-4363433172488, 160251326396727,-6389255111157990, 274851082201092530,-12689236310679318864, 625827924636908620381,-32839089116018960634852] |