n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 24 |
5 | 110 |
6 | 600 |
7 | 3836 |
8 | 28224 |
9 | 235224 |
10 | 2191680 |
11 | 22584672 |
12 | 255087360 |
13 | 3134139840 |
14 | 41620400640 |
15 | 594082771200 |
16 | 9070900715520 |
17 | 147531542054400 |
18 | 2546434166169600 |
19 | 46489412442009600 |
20 | 895079522340864000 |
21 | 18125736166340812800 |
22 | 385129713617510400000 |
[0,0,0,6,24,110,600,3836,28224,235224,2191680, 22584672,255087360,3134139840,41620400640, 594082771200,9070900715520,147531542054400, 2546434166169600,46489412442009600, 895079522340864000,18125736166340812800, 385129713617510400000] |