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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | -3 |
| 4 | 0 |
| 5 | -10 |
| 6 | 400 |
| 7 | -3276 |
| 8 | 12768 |
| 9 | -72864 |
| 10 | 1933888 |
| 11 | -32108560 |
| 12 | 322393280 |
| 13 | -3122225184 |
| 14 | 60417280768 |
| 15 | -1349906937120 |
| 16 | 23068109840384 |
| 17 | -351887538631168 |
| 18 | 6985288388898816 |
| 19 | -174933529672527360 |
[0,0,2,-3,0,-10,400,-3276,12768,-72864,1933888, -32108560,322393280,-3122225184,60417280768, -1349906937120,23068109840384,-351887538631168, 6985288388898816,-174933529672527360] |