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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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 12 |
| 5 | 60 |
| 6 | 360 |
| 7 | 2520 |
| 8 | 20160 |
| 9 | 181440 |
| 10 | 1814400 |
| 11 | 19958400 |
| 12 | 239500800 |
[1,1,1,3,12,60,360,2520,20160,181440,1814400, 19958400,239500800] |