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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 | 6 |
| 4 | -22 |
| 5 | 176 |
| 6 | -1192 |
| 7 | 12240 |
| 8 | -122288 |
| 9 | 1561088 |
| 10 | -20588544 |
| 11 | 318007808 |
| 12 | -5193155328 |
| 13 | 94807748608 |
| 14 | -1841205505024 |
| 15 | 38942692972544 |
| 16 | -875204314126336 |
| 17 | 21088169713729536 |
| 18 | -537861879179575296 |
| 19 | 14558790290337431552 |
[0,1,-1,6,-22,176,-1192,12240,-122288,1561088, -20588544,318007808,-5193155328,94807748608, -1841205505024,38942692972544,-875204314126336, 21088169713729536,-537861879179575296, 14558790290337431552] |