n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 12 |
4 | 160 |
5 | 1440 |
6 | 20928 |
7 | 309120 |
8 | 5604352 |
9 | 110896128 |
10 | 2480762880 |
11 | 60669480960 |
12 | 1625897189376 |
13 | 47158671605760 |
14 | 1475038408015872 |
15 | 49434699759943680 |
16 | 1768135111433256960 |
17 | 67206058595340779520 |
18 | 2705431746964327759872 |
[1,0,4,12,160,1440,20928,309120,5604352,110896128, 2480762880,60669480960,1625897189376, 47158671605760,1475038408015872,49434699759943680, 1768135111433256960,67206058595340779520, 2705431746964327759872] |