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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 | 1 |
| 2 | -1 |
| 3 | 3 |
| 4 | -10 |
| 5 | 41 |
| 6 | -232 |
| 7 | 1467 |
| 8 | -11408 |
| 9 | 100625 |
| 10 | -1000704 |
| 11 | 11103155 |
| 12 | -135118080 |
| 13 | 1795927225 |
| 14 | -25845415936 |
| 15 | 400540116971 |
| 16 | -6651228620800 |
| 17 | 117802787966241 |
| 18 | -2216949901393920 |
| 19 | 44174901566136419 |
| 20 | -929133071750004736 |
[0,1,-1,3,-10,41,-232,1467,-11408,100625,-1000704, 11103155,-135118080,1795927225,-25845415936, 400540116971,-6651228620800,117802787966241, -2216949901393920,44174901566136419, -929133071750004736] |