n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 46 |
6 | 44 |
7 | 288 |
8 | 33216 |
9 | 613248 |
10 | 151296 |
11 | 391584768 |
12 | 2383570944 |
13 | 86830424064 |
14 | 206470840320 |
15 | 21270238986240 |
16 | 987259950858240 |
17 | 1262040231444480 |
18 | 3022250536693923840 |
19 | 3884253754215628800 |
20 | 1102040800033347993600 |
21 | 1892288242221318144000 |
22 | 5616902226049109065728000 |
[0,1,1,1,46,44,288,33216,613248,151296,391584768, 2383570944,86830424064,206470840320, 21270238986240,987259950858240,1262040231444480, 3022250536693923840,3884253754215628800, 1102040800033347993600,1892288242221318144000, 5616902226049109065728000] |