n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 224 |
3 | 1920 |
4 | 14080 |
5 | 93184 |
6 | 573440 |
7 | 3342336 |
8 | 18677760 |
9 | 100925440 |
10 | 530579456 |
11 | 2726297600 |
12 | 13740539904 |
13 | 68115496960 |
14 | 332859965440 |
15 | 1606317768704 |
16 | 7666516623360 |
17 | 36232344109056 |
18 | 169737107537920 |
19 | 788899592929280 |
[1,20,224,1920,14080,93184,573440,3342336, 18677760,100925440,530579456,2726297600, 13740539904,68115496960,332859965440, 1606317768704,7666516623360,36232344109056, 169737107537920,788899592929280] |