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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 30 |
| 3 | 288 |
| 4 | 660 |
| 5 | 720 |
| 6 | 2146560 |
[10,30,288,660,720,2146560] |