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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 8 |
| 4 | 251 |
| 5 | 1872 |
| 6 | 720452 |
| 7 | 33675352 |
[2,5,8,251,1872,720452,33675352] |