n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 36 |
3 | 480 |
4 | 8400 |
5 | 181440 |
6 | 4656960 |
7 | 138378240 |
8 | 4670265600 |
9 | 176432256000 |
10 | 7374868300800 |
11 | 337903056691200 |
12 | 16838835658444800 |
13 | 906706535454720000 |
14 | 52459449551308800000 |
15 | 3245491278907637760000 |
16 | 213796737998040637440000 |
[1,4,36,480,8400,181440,4656960,138378240, 4670265600,176432256000,7374868300800, 337903056691200,16838835658444800, 906706535454720000,52459449551308800000, 3245491278907637760000,213796737998040637440000] |