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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 | 4 |
| 3 | 42 |
| 4 | 1008 |
| 5 | 51480 |
| 6 | 5353920 |
| 7 | 1100473920 |
| 8 | 437480709120 |
| 9 | 330886851724800 |
| 10 | 470053968773760000 |
| 11 | 1241242628123282400000 |
| 12 | 6040838558884497984000000 |
| 13 | 53797620867616662708672000000 |
| 14 | 871394214986903051252166758400000 |
[1,4,42,1008,51480,5353920,1100473920, 437480709120,330886851724800,470053968773760000, 1241242628123282400000,6040838558884497984000000, 53797620867616662708672000000, 871394214986903051252166758400000] |