n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 24 |
4 | 240 |
5 | 4080 |
6 | 110880 |
7 | 4404960 |
8 | 238452480 |
9 | 16777393920 |
10 | 1484592883200 |
11 | 161180605555200 |
12 | 21054378333542400 |
13 | 3256459844769331200 |
14 | 588451470437627596800 |
15 | 122827588904844375552000 |
[0,1,4,24,240,4080,110880,4404960,238452480, 16777393920,1484592883200,161180605555200, 21054378333542400,3256459844769331200, 588451470437627596800,122827588904844375552000] |