n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 8 |
4 | 32 |
5 | 128 |
6 | 864 |
7 | 3456 |
8 | 7776 |
9 | 31104 |
10 | 279936 |
11 | 497664 |
12 | 1990656 |
13 | 4478976 |
14 | 17915904 |
15 | 62208000 |
16 | 97200000 |
17 | 559872000 |
18 | 874800000 |
19 | 1555200000 |
20 | 6220800000 |
21 | 13996800000 |
22 | 55987200000 |
[1,2,8,32,128,864,3456,7776,31104,279936,497664, 1990656,4478976,17915904,62208000,97200000, 559872000,874800000,1555200000,6220800000, 13996800000,55987200000] |