n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 24 |
5 | 60 |
6 | 240 |
7 | 1260 |
8 | 8064 |
9 | 60480 |
10 | 518400 |
11 | 4989600 |
12 | 53222400 |
13 | 622702080 |
14 | 7925299200 |
15 | 108972864000 |
16 | 1609445376000 |
17 | 25406244864000 |
18 | 426824913715200 |
19 | 7602818775552000 |
20 | 143111882833920000 |
21 | 2838385676206080000 |
22 | 59157933040926720000 |
23 | 1292600836944248832000 |
[0,0,0,0,24,60,240,1260,8064,60480,518400,4989600, 53222400,622702080,7925299200,108972864000, 1609445376000,25406244864000,426824913715200, 7602818775552000,143111882833920000, 2838385676206080000,59157933040926720000, 1292600836944248832000] |