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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 180 |
| 4 | 28232 |
| 5 | 25474838 |
| 6 | 17363131000 |
[0,180,28232,25474838,17363131000] |