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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 9 |
| 4 | 48 |
| 5 | 180 |
| 6 | 1322 |
| 7 | 6853 |
| 8 | 43804 |
| 9 | 283623 |
| 10 | 1885015 |
| 11 | 13026464 |
| 12 | 90977470 |
| 13 | 644191249 |
| 14 | 4594696120 |
| 15 | 32969721835 |
| 16 | 237966662872 |
[1,9,48,180,1322,6853,43804,283623,1885015, 13026464,90977470,644191249,4594696120, 32969721835,237966662872] |