n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 48 |
3 | 888 |
4 | 22120 |
5 | 685368 |
6 | 25344480 |
7 | 1087931184 |
8 | 53138966904 |
9 | 2909014993080 |
10 | 176372774697856 |
11 | 11729862804913680 |
12 | 848948339328178128 |
13 | 66420006805308507568 |
14 | 5585680154203107163200 |
15 | 502437191145813112268640 |
16 | 48134705092961286591532440 |
[1,4,48,888,22120,685368,25344480,1087931184, 53138966904,2909014993080,176372774697856, 11729862804913680,848948339328178128, 66420006805308507568,5585680154203107163200, 502437191145813112268640, 48134705092961286591532440] |