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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 | 15 |
| 3 | 171 |
| 4 | 2799 |
| 5 | 46933 |
| 6 | 831358 |
| 7 | 15085844 |
| 8 | 279317154 |
| 9 | 5247744254 |
[1,15,171,2799,46933,831358,15085844,279317154, 5247744254] |