n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 24 |
4 | 224 |
5 | 2880 |
6 | 48064 |
7 | 989184 |
8 | 24218624 |
9 | 687083520 |
10 | 22151148544 |
11 | 799546834944 |
12 | 31934834253824 |
13 | 1398132497448960 |
14 | 66573473015578624 |
15 | 3425078687463112704 |
16 | 189331392774496845824 |
17 | 11190654534195295027200 |
18 | 704262689221037166690304 |
19 | 47015904809670036594622464 |
20 | 3318579148264602406039322624 |
[1,4,24,224,2880,48064,989184,24218624,687083520, 22151148544,799546834944,31934834253824, 1398132497448960,66573473015578624, 3425078687463112704,189331392774496845824, 11190654534195295027200,704262689221037166690304, 47015904809670036594622464, 3318579148264602406039322624] |