n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 60 |
7 | 640 |
8 | 5040 |
9 | 39424 |
10 | 315840 |
11 | 2572800 |
12 | 22730400 |
13 | 207820800 |
14 | 1979577600 |
15 | 20119756800 |
16 | 180756576000 |
17 | 1740900761600 |
18 | 17732095180800 |
19 | 197872975872000 |
20 | 2123068147200000 |
21 | 24858537099264000 |
22 | 303091124244480000 |
23 | 4076808466857984000 |
[0,0,0,0,0,0,60,640,5040,39424,315840,2572800, 22730400,207820800,1979577600,20119756800, 180756576000,1740900761600,17732095180800, 197872975872000,2123068147200000, 24858537099264000,303091124244480000, 4076808466857984000] |