n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 180 |
4 | 1002 |
5 | 6012 |
6 | 34224 |
7 | 205344 |
8 | 1180010 |
9 | 7080060 |
10 | 40911324 |
11 | 245467944 |
12 | 1423944024 |
13 | 8543664144 |
14 | 49710351720 |
15 | 298262110320 |
16 | 1739627237002 |
17 | 10437763422012 |
18 | 61002039226716 |
19 | 366012235360296 |
20 | 2142786218045748 |
21 | 12856717308274488 |
22 | 75380119335678608 |
[1,6,30,180,1002,6012,34224,205344,1180010, 7080060,40911324,245467944,1423944024,8543664144, 49710351720,298262110320,1739627237002, 10437763422012,61002039226716,366012235360296, 2142786218045748,12856717308274488, 75380119335678608] |