n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 33 |
4 | 192 |
5 | 1320 |
6 | 10440 |
7 | 93240 |
8 | 927360 |
9 | 10160640 |
10 | 121564800 |
11 | 1576713600 |
12 | 22034073600 |
13 | 330032102400 |
14 | 5274286617600 |
15 | 89575694208000 |
16 | 1611054821376000 |
17 | 30589118816256000 |
18 | 611426688897024000 |
19 | 12833558093131776000 |
20 | 282216632948490240000 |
[1,2,7,33,192,1320,10440,93240,927360,10160640, 121564800,1576713600,22034073600,330032102400, 5274286617600,89575694208000,1611054821376000, 30589118816256000,611426688897024000, 12833558093131776000,282216632948490240000] |