n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 24 |
4 | 312 |
5 | 4720 |
6 | 82800 |
7 | 1662024 |
8 | 37665152 |
9 | 952401888 |
10 | 26602156800 |
11 | 813815035000 |
12 | 27069937855488 |
13 | 972940216546896 |
14 | 37581134047987712 |
15 | 1552687346633913000 |
16 | 68331503866677657600 |
17 | 3191386068123595166656 |
18 | 157663539876436721860608 |
[0,2,24,312,4720,82800,1662024,37665152,952401888, 26602156800,813815035000,27069937855488, 972940216546896,37581134047987712, 1552687346633913000,68331503866677657600, 3191386068123595166656,157663539876436721860608] |