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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 393 |
| 4 | 33009 |
| 5 | 4410033 |
| 6 | 872617017 |
| 7 | 240500373753 |
| 8 | 88094910348129 |
| 9 | 41401437242599905 |
| 10 | 24287046275803547625 |
| 11 | 17396048031084882189033 |
| 12 | 14941352753081733849348945 |
| 13 | 15157924050230673397966293393 |
[1,1,9,393,33009,4410033,872617017,240500373753, 88094910348129,41401437242599905, 24287046275803547625,17396048031084882189033, 14941352753081733849348945, 15157924050230673397966293393] |