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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 | 12 |
| 5 | -40 |
| 6 | 430 |
| 7 | -3591 |
| 8 | 37464 |
| 9 | -373752 |
| 10 | 4749658 |
| 11 | -65476675 |
| 12 | 1030634660 |
| 13 | -17005495728 |
| 14 | 307003733062 |
| 15 | -5926728736215 |
| 16 | 123925742441648 |
| 17 | -2752109508497296 |
| 18 | 65023509028085682 |
| 19 | -1622290259238643683 |
[0,0,2,-3,12,-40,430,-3591,37464,-373752,4749658, -65476675,1030634660,-17005495728,307003733062, -5926728736215,123925742441648,-2752109508497296, 65023509028085682,-1622290259238643683] |