n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 720 |
7 | 10080 |
8 | 87360 |
9 | 604800 |
10 | 3674160 |
11 | 20512800 |
12 | 108044640 |
13 | 545688000 |
14 | 2671036368 |
15 | 12763951200 |
16 | 59856451200 |
17 | 276499641600 |
18 | 1261691128944 |
19 | 5699120476320 |
20 | 25525119703200 |
21 | 113497442856000 |
22 | 501533701110288 |
23 | 2204246146687200 |
24 | 9641611208433600 |
[0,0,0,0,0,0,720,10080,87360,604800,3674160, 20512800,108044640,545688000,2671036368, 12763951200,59856451200,276499641600, 1261691128944,5699120476320,25525119703200, 113497442856000,501533701110288,2204246146687200, 9641611208433600] |