n | a(n) |
---|---|
1 | 1 |
2 | 24 |
3 | 240 |
4 | 504 |
5 | 65520 |
6 | 131040 |
7 | 171864 |
8 | 138181680 |
9 | 6814407600 |
10 | 20174525280 |
11 | 45185409360 |
12 | 558781423200 |
13 | 685933859520 |
14 | 2601256998740400 |
15 | 4578654981700800 |
16 | 15571124394460034400 |
17 | 375159113055066740400 |
18 | 124708934978441512498800 |
19 | 127589793288205521873600 |
20 | 8644416283014847832296800 |
21 | 29217965124687229769336640 |
[1,24,240,504,65520,131040,171864,138181680, 6814407600,20174525280,45185409360,558781423200, 685933859520,2601256998740400,4578654981700800, 15571124394460034400,375159113055066740400, 124708934978441512498800,127589793288205521873600, 8644416283014847832296800, 29217965124687229769336640] |