n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 36 |
3 | 720 |
4 | 25200 |
5 | 1940400 |
6 | 227026800 |
7 | 42454011600 |
8 | 10486140865200 |
9 | 3858899838393600 |
10 | 1902437620328044800 |
11 | 1120535758373218387200 |
12 | 953575930375608847507200 |
13 | 977415328634999068694880000 |
14 | 1218836914807843838662515360000 |
15 | 1775845384875028472931284879520000 |
[1,4,36,720,25200,1940400,227026800,42454011600, 10486140865200,3858899838393600, 1902437620328044800,1120535758373218387200, 953575930375608847507200, 977415328634999068694880000, 1218836914807843838662515360000, 1775845384875028472931284879520000] |