n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 48 |
3 | 2160 |
4 | 40320 |
5 | 787500 |
6 | 12773376 |
7 | 198942744 |
8 | 2905943040 |
9 | 40973240880 |
10 | 558886900000 |
11 | 7437264466632 |
12 | 96894798594048 |
13 | 1240510066959800 |
14 | 15645553270401600 |
15 | 194802398523000000 |
16 | 2398428702498447360 |
17 | 29240457953102773740 |
18 | 353391128284307097600 |
[0,2,48,2160,40320,787500,12773376,198942744, 2905943040,40973240880,558886900000,7437264466632, 96894798594048,1240510066959800,15645553270401600, 194802398523000000,2398428702498447360, 29240457953102773740,353391128284307097600] |