n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 1 |
4 | 0 |
5 | 0 |
6 | 6 |
7 | 6 |
8 | 0 |
9 | 0 |
10 | 720 |
11 | 2160 |
12 | 9360 |
13 | 19440 |
14 | 30240 |
15 | 3659040 |
16 | 21772800 |
17 | 228614400 |
18 | 1632960000 |
19 | 11125900800 |
20 | 73025971200 |
21 | 1708337433600 |
22 | 15442053580800 |
23 | 254260755302400 |
24 | 3318429200486400 |
25 | 46929444097536000 |
26 | 546974781889536000 |
27 | 7312714579602432000 |
[1,1,0,1,0,0,6,6,0,0,720,2160,9360,19440,30240, 3659040,21772800,228614400,1632960000,11125900800, 73025971200,1708337433600,15442053580800, 254260755302400,3318429200486400, 46929444097536000,546974781889536000, 7312714579602432000] |