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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 | 0 |
| 2 | 0 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 3240 |
| 7 | 40320 |
| 8 | 463680 |
| 9 | 11491200 |
| 10 | 248572800 |
| 11 | 4869849600 |
| 12 | 135896745600 |
| 13 | 4017466252800 |
| 14 | 113150157120000 |
| 15 | 3765622699238400 |
| 16 | 137549036072448000 |
| 17 | 5019223860338688000 |
| 18 | 199794776937044889600 |
| 19 | 8636618647667288678400 |
[1,0,0,6,24,120,3240,40320,463680,11491200, 248572800,4869849600,135896745600,4017466252800, 113150157120000,3765622699238400, 137549036072448000,5019223860338688000, 199794776937044889600,8636618647667288678400] |