n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 36 |
6 | 240 |
7 | 1296 |
8 | 6312 |
9 | 31824 |
10 | 165840 |
11 | 883872 |
12 | 4861056 |
13 | 27433728 |
14 | 155696585 |
15 | 878719104 |
16 | 4938274944 |
17 | 27770211072 |
18 | 156752183808 |
19 | 889181991936 |
20 | 5067822213734 |
21 | 28987320651922 |
22 | 166186204664832 |
23 | 954240788994048 |
24 | 5486884531697664 |
25 | 31596861676172076 |
[0,1,2,6,36,240,1296,6312,31824,165840,883872, 4861056,27433728,155696585,878719104,4938274944, 27770211072,156752183808,889181991936, 5067822213734,28987320651922,166186204664832, 954240788994048,5486884531697664, 31596861676172076] |