n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 14 |
3 | 150 |
4 | 1560 |
5 | 16800 |
6 | 191520 |
7 | 2328480 |
8 | 30240000 |
9 | 419126400 |
10 | 6187104000 |
11 | 97037740800 |
12 | 1612798387200 |
13 | 28332944640000 |
14 | 524813313024000 |
15 | 10226013557760000 |
16 | 209144207720448000 |
17 | 4480594531725312000 |
18 | 100357207837286400000 |
19 | 2345925761384325120000 |
20 | 57136703662028390400000 |
[0,1,14,150,1560,16800,191520,2328480,30240000, 419126400,6187104000,97037740800,1612798387200, 28332944640000,524813313024000,10226013557760000, 209144207720448000,4480594531725312000, 100357207837286400000,2345925761384325120000, 57136703662028390400000] |