n | a(n) |
---|---|
1 | 2 |
2 | 0 |
3 | 0 |
4 | 8 |
5 | 30 |
6 | 192 |
7 | 1344 |
8 | 10800 |
9 | 97434 |
10 | 976000 |
11 | 10749024 |
12 | 129103992 |
13 | 1679495350 |
14 | 23525384064 |
15 | 353028802560 |
16 | 5650370001120 |
17 | 96082828074162 |
18 | 1729886440780800 |
19 | 32874134679574208 |
20 | 657589108734075240 |
21 | 13811277748363437006 |
22 | 303884178002526338624 |
[2,0,0,8,30,192,1344,10800,97434,976000,10749024, 129103992,1679495350,23525384064,353028802560, 5650370001120,96082828074162,1729886440780800, 32874134679574208,657589108734075240, 13811277748363437006,303884178002526338624] |