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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 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 672 |
| 7 | 4188 |
| 8 | 28848 |
| 9 | 234528 |
| 10 | 2079828 |
| 11 | 20606690 |
| 12 | 211939474 |
| 13 | 2381039898 |
| 14 | 28964770548 |
| 15 | 377119012016 |
| 16 | 5313570528018 |
[1,2,6,24,120,672,4188,28848,234528,2079828, 20606690,211939474,2381039898,28964770548, 377119012016,5313570528018] |