n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 8 |
4 | 45 |
5 | 504 |
6 | 5040 |
7 | 86400 |
8 | 1247400 |
9 | 28828800 |
10 | 544864320 |
11 | 15850598400 |
12 | 370507737600 |
13 | 12996271411200 |
14 | 362038989312000 |
15 | 14867734494412800 |
16 | 480878287553664000 |
17 | 22629566473113600000 |
18 | 833522365093017600000 |
[1,1,8,45,504,5040,86400,1247400,28828800, 544864320,15850598400,370507737600,12996271411200, 362038989312000,14867734494412800, 480878287553664000,22629566473113600000, 833522365093017600000] |