n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 18 |
4 | 32 |
5 | 600 |
6 | 4320 |
7 | 11760 |
8 | 322560 |
9 | 3265920 |
10 | 1728000 |
11 | 439084800 |
12 | 821145600 |
13 | 817689600 |
14 | 1220496076800 |
15 | 19615115520000 |
16 | 111588212736000 |
17 | 863812325376000 |
18 | 115242726703104000 |
19 | 15722836107264000 |
20 | 3742926166425600000 |
[1,4,18,32,600,4320,11760,322560,3265920,1728000, 439084800,821145600,817689600,1220496076800, 19615115520000,111588212736000,863812325376000, 115242726703104000,15722836107264000, 3742926166425600000] |