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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 2 |
| 4 | 9 |
| 5 | 48 |
| 6 | 250 |
| 7 | 1200 |
| 8 | 5922 |
| 9 | 34160 |
| 10 | 185460 |
| 11 | 1201920 |
| 12 | 6837600 |
| 13 | 49680576 |
| 14 | 314028000 |
| 15 | 2611065600 |
| 16 | 17913619680 |
| 17 | 162456519680 |
| 18 | 1235053617600 |
| 19 | 12593800627200 |
| 20 | 99016069824000 |
| 21 | 1062491684981760 |
| 22 | 9425603347776000 |
| 23 | 114292447803494400 |
| 24 | 1026754912019865600 |
[0,2,9,48,250,1200,5922,34160,185460,1201920, 6837600,49680576,314028000,2611065600,17913619680, 162456519680,1235053617600,12593800627200, 99016069824000,1062491684981760,9425603347776000, 114292447803494400,1026754912019865600] |