The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 6 | 2 |
| 7 | 24 |
| 8 | 274 |
| 9 | 3204 |
| 10 | 39420 |
| 11 | 514296 |
| 12 | 7137818 |
| 13 | 105318770 |
| 14 | 1649355338 |
| 15 | 27356466626 |
| 16 | 479446719522 |
| 17 | 8858271760146 |
| 18 | 172151975433756 |
| 19 | 3511580514677006 |
| 20 | 75032190827549478 |
| 21 | 1676210011258705592 |
| 22 | 39082263260517298658 |
| 23 | 949481770375318700914 |
| 24 | 23998362106238648271276 |
[2,24,274,3204,39420,514296,7137818,105318770, 1649355338,27356466626,479446719522,8858271760146, 172151975433756,3511580514677006, 75032190827549478,1676210011258705592, 39082263260517298658,949481770375318700914, 23998362106238648271276] |