n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 0 |
5 | 24 |
6 | 0 |
7 | 504 |
8 | 5040 |
9 | 0 |
10 | 226800 |
11 | 3628800 |
12 | 0 |
13 | 438721920 |
14 | 6227020800 |
15 | 16345929600 |
16 | 1127656857600 |
17 | 20922789888000 |
18 | 58203397324800 |
19 | 6697914906009600 |
20 | 121645100408832000 |
21 | 655224745383936000 |
22 | 51359276952023040000 |
23 | 1124000727777607680000 |
[1,0,1,0,0,24,0,504,5040,0,226800,3628800,0, 438721920,6227020800,16345929600,1127656857600, 20922789888000,58203397324800,6697914906009600, 121645100408832000,655224745383936000, 51359276952023040000,1124000727777607680000] |