n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 4 |
6 | 252 |
7 | 2304 |
8 | 343712160 |
9 | 17361257184 |
10 | 817232021393069622912 |
11 | 337615438409845853800240 |
12 | 1002314950534089781700930298791626826040504 |
13 | 4687493998578314511363173974007271386258869456 |
[1,1,1,2,4,252,2304,343712160,17361257184, 817232021393069622912,337615438409845853800240, 1002314950534089781700930298791626826040504, 4687493998578314511363173974007271386258869456] |