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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 | 1 |
| 3 | 1 |
| 4 | 9 |
| 5 | 25 |
| 6 | 93 |
| 7 | 589 |
| 8 | 6735 |
| 9 | 107293 |
| 10 | 1848191 |
| 11 | 45715541 |
| 12 | 1702371353 |
| 13 | 91650035599 |
| 14 | 6670440839931 |
| 15 | 660214237801903 |
[1,1,1,9,25,93,589,6735,107293,1848191,45715541, 1702371353,91650035599,6670440839931, 660214237801903] |