n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 96 |
6 | 456 |
7 | 2472 |
8 | 14736 |
9 | 92304 |
10 | 632736 |
11 | 4661856 |
12 | 36364032 |
13 | 297668736 |
14 | 2583425664 |
15 | 23550535296 |
16 | 224086162176 |
17 | 2221083839232 |
18 | 22976670905856 |
19 | 246829966447104 |
20 | 2745834333566976 |
21 | 31605782067081216 |
22 | 376290722808502272 |
[1,1,2,6,24,96,456,2472,14736,92304,632736, 4661856,36364032,297668736,2583425664,23550535296, 224086162176,2221083839232,22976670905856, 246829966447104,2745834333566976, 31605782067081216,376290722808502272] |