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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 44 |
| 4 | 416 |
| 5 | 26815 |
| 6 | 464031 |
[1,3,44,416,26815,464031] |