n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 24 |
4 | 324 |
5 | 5120 |
6 | 93750 |
7 | 1959552 |
8 | 46118408 |
9 | 1207959552 |
10 | 34867844010 |
11 | 1100000000000 |
12 | 37661140520652 |
13 | 1390911669927936 |
14 | 55123269399790046 |
15 | 2333521433367183360 |
16 | 105094533691406250000 |
17 | 5017514388048998039552 |
18 | 253135520137219049838162 |
19 | 13456471561751415850795008 |
[0,0,2,24,324,5120,93750,1959552,46118408, 1207959552,34867844010,1100000000000, 37661140520652,1390911669927936,55123269399790046, 2333521433367183360,105094533691406250000, 5017514388048998039552,253135520137219049838162, 13456471561751415850795008] |