n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 30 |
3 | 560 |
4 | 11550 |
5 | 252252 |
6 | 5717712 |
7 | 133024320 |
8 | 3155170590 |
9 | 75957810500 |
10 | 1850332263780 |
11 | 45508998487680 |
12 | 1128243920840400 |
13 | 28159366024288800 |
14 | 706857555303576000 |
15 | 17831659928458210560 |
16 | 451781821468671694110 |
17 | 11489952898943726476500 |
18 | 293206575828601020085500 |
[1,2,30,560,11550,252252,5717712,133024320, 3155170590,75957810500,1850332263780, 45508998487680,1128243920840400,28159366024288800, 706857555303576000,17831659928458210560, 451781821468671694110,11489952898943726476500, 293206575828601020085500] |