n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 60 |
4 | 672 |
5 | 5400 |
6 | 88704 |
7 | 982800 |
8 | 21288960 |
9 | 300736800 |
10 | 8089804800 |
11 | 138940401600 |
12 | 4465572249600 |
13 | 90311261040000 |
14 | 3375972620697600 |
15 | 78570797104800000 |
16 | 3348964839732019200 |
17 | 88156434351585600000 |
18 | 4219695698062344192000 |
19 | 123947946698329353600000 |
[1,2,12,60,672,5400,88704,982800,21288960, 300736800,8089804800,138940401600,4465572249600, 90311261040000,3375972620697600,78570797104800000, 3348964839732019200,88156434351585600000, 4219695698062344192000,123947946698329353600000] |