n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 140 |
4 | 270 |
5 | 672 |
6 | 8190 |
7 | 30240 |
8 | 332640 |
9 | 14303520 |
10 | 17428320 |
11 | 27027000 |
12 | 191711520 |
13 | 2144862720 |
14 | 3506025600 |
15 | 5943057120 |
16 | 14378364000 |
17 | 45578332800 |
18 | 288662774400 |
19 | 505159855200 |
20 | 2020639420800 |
21 | 10680522652800 |
22 | 54557264361600 |
[1,6,140,270,672,8190,30240,332640,14303520, 17428320,27027000,191711520,2144862720,3506025600, 5943057120,14378364000,45578332800,288662774400, 505159855200,2020639420800,10680522652800, 54557264361600] |