n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 72 |
3 | 1296 |
4 | 15552 |
5 | 155520 |
6 | 1399680 |
7 | 11757312 |
8 | 94058496 |
9 | 725594112 |
10 | 5441955840 |
11 | 39907676160 |
12 | 287335268352 |
13 | 2037468266496 |
14 | 14262277865472 |
15 | 98738846760960 |
16 | 677066377789440 |
17 | 4604051368968192 |
18 | 31077346740535296 |
[0,0,72,1296,15552,155520,1399680,11757312, 94058496,725594112,5441955840,39907676160, 287335268352,2037468266496,14262277865472, 98738846760960,677066377789440,4604051368968192, 31077346740535296] |