n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 48 |
4 | 352 |
5 | 3008 |
6 | 29440 |
7 | 324096 |
8 | 3947520 |
9 | 52541440 |
10 | 757260288 |
11 | 11733385216 |
12 | 194272854016 |
13 | 3419584921600 |
14 | 63707979972608 |
15 | 1251489089060864 |
16 | 25836869372608512 |
17 | 558946705406427136 |
18 | 12638569755079344128 |
19 | 298003073694026432512 |
20 | 7312035980392431353856 |
[1,2,8,48,352,3008,29440,324096,3947520,52541440, 757260288,11733385216,194272854016,3419584921600, 63707979972608,1251489089060864,25836869372608512, 558946705406427136,12638569755079344128, 298003073694026432512,7312035980392431353856] |