n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 20 |
5 | 336 |
6 | 154440 |
7 | 8204716800 |
8 | 5778574175582208000 |
9 | 43004718293359780142729736192000000 |
10 | 1300207208378579462193856077468752280037294977727353323520000000 |
[1,2,3,20,336,154440,8204716800, 5778574175582208000, 43004718293359780142729736192000000, 13002072083785794621938560774687522800372949777273\ 53323520000000] |