n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 288 |
4 | 2016 |
5 | 14040 |
6 | 98280 |
7 | 686880 |
8 | 4808160 |
9 | 33638976 |
10 | 235472832 |
11 | 1647983232 |
12 | 11535882624 |
13 | 80745019776 |
14 | 565215138432 |
15 | 3956385876480 |
16 | 27694701135360 |
17 | 193860506096640 |
18 | 1357023542676480 |
19 | 9499115800977408 |
[1,6,42,288,2016,14040,98280,686880,4808160, 33638976,235472832,1647983232,11535882624, 80745019776,565215138432,3956385876480, 27694701135360,193860506096640,1357023542676480, 9499115800977408] |