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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 | 5 |
| 3 | 17 |
| 4 | 110 |
| 5 | 1383 |
| 6 | 28772 |
| 7 | 979472 |
| 8 | 57250646 |
| 9 | 5612977959 |
[1,5,17,110,1383,28772,979472,57250646,5612977959] |