n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 40320 |
10 | 4032000 |
11 | 266112000 |
12 | 15008716800 |
13 | 794060467200 |
14 | 41179634496000 |
15 | 2142915046272000 |
16 | 113401428940800000 |
17 | 6150985123214131200 |
18 | 343578020565722342400 |
19 | 19818131438503157760000 |
20 | 1182304993642509574656000 |
21 | 73005714001076187082752000 |
[0,0,0,0,0,0,0,0,0,40320,4032000,266112000, 15008716800,794060467200,41179634496000, 2142915046272000,113401428940800000, 6150985123214131200,343578020565722342400, 19818131438503157760000,1182304993642509574656000, 73005714001076187082752000] |