n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 16 |
4 | 152 |
5 | 1536 |
6 | 13776 |
7 | 118664 |
8 | 991616 |
9 | 8109024 |
10 | 65252928 |
11 | 518482400 |
12 | 4077987584 |
13 | 31806458880 |
14 | 246337686272 |
15 | 1896480302208 |
16 | 14525403049984 |
17 | 110754291988992 |
18 | 841167574029312 |
19 | 6366346796688896 |
20 | 48033932904861696 |
[0,0,16,152,1536,13776,118664,991616,8109024, 65252928,518482400,4077987584,31806458880, 246337686272,1896480302208,14525403049984, 110754291988992,841167574029312,6366346796688896, 48033932904861696] |