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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 | 60 |
| 3 | 728 |
| 4 | 6960 |
| 5 | 60512 |
| 6 | 97152 |
| 7 | 728000 |
| 8 | 1900080 |
| 9 | 2184000 |
| 10 | 4371840 |
| 11 | 26522496 |
| 12 | 843480000 |
| 13 | 23009688000 |
| 14 | 46352390400 |
| 15 | 93155148800 |
| 16 | 279465446400 |
| 17 | 701869363200 |
| 18 | 938948846080 |
| 19 | 1099176108032 |
| 20 | 2816846538240 |
[1,60,728,6960,60512,97152,728000,1900080,2184000, 4371840,26522496,843480000,23009688000, 46352390400,93155148800,279465446400,701869363200, 938948846080,1099176108032,2816846538240] |