n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 8 |
4 | 144 |
5 | 3456 |
6 | 172800 |
7 | 10368000 |
8 | 3810240000 |
9 | 177811200000 |
10 | 9957427200000 |
11 | 75278149632000000 |
12 | 1912817782149120000000 |
13 | 53023308921173606400000000 |
14 | 17742659631203112173568000000000 |
15 | 426249654980023566857797632000000000 |
16 | 9600207854287580784554747166720000000000 |
[1,1,4,8,144,3456,172800,10368000,3810240000, 177811200000,9957427200000,75278149632000000, 1912817782149120000000,53023308921173606400000000, 17742659631203112173568000000000, 426249654980023566857797632000000000, 9600207854287580784554747166720000000000] |