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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -40 |
| 2 | 760 |
| 3 | -9120 |
| 4 | 77560 |
| 5 | -497648 |
| 6 | 2508000 |
| 7 | -10232640 |
| 8 | 34729720 |
| 9 | -100906760 |
| 10 | 259114704 |
| 11 | -606957280 |
| 12 | 1327461600 |
| 13 | -2738111280 |
| 14 | 5341699520 |
| 15 | -9915552192 |
| 16 | 17701924600 |
| 17 | -30615844560 |
| 18 | 51294999960 |
| 19 | -83279292960 |
| 20 | 131880275664 |
| 21 | -204949382400 |
| 22 | 312126610080 |
| 23 | -464844224960 |
| 24 | 680432137440 |
[1,-40,760,-9120,77560,-497648,2508000,-10232640, 34729720,-100906760,259114704,-606957280, 1327461600,-2738111280,5341699520,-9915552192, 17701924600,-30615844560,51294999960,-83279292960, 131880275664,-204949382400,312126610080, -464844224960,680432137440] |