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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 | 2 |
| 4 | 6 |
| 5 | 21 |
| 6 | 224 |
| 7 | 10848 |
| 8 | 4843293 |
| 9 | 98262557120 |
| 10 | 989063619297120960 |
| 11 | 197348115975871052843094930213 |
| 12 | 380244324677612882673067751880150651746235378560 |
[1,1,2,6,21,224,10848,4843293,98262557120, 989063619297120960,197348115975871052843094930213, 380244324677612882673067751880150651746235378560] |