n | a(n) |
---|---|
4 | 1 |
5 | 63 |
6 | 1932 |
7 | 46620 |
8 | 1020600 |
9 | 21538440 |
10 | 451725120 |
11 | 9574044480 |
12 | 207048441600 |
13 | 4595022432000 |
14 | 105006251750400 |
15 | 2475732702643200 |
16 | 60284572969420800 |
17 | 1516762345722624000 |
18 | 39433286715863040000 |
19 | 1059143615076298752000 |
20 | 29378569022287220736000 |
21 | 841159994641469927424000 |
[1,63,1932,46620,1020600,21538440,451725120, 9574044480,207048441600,4595022432000, 105006251750400,2475732702643200, 60284572969420800,1516762345722624000, 39433286715863040000,1059143615076298752000, 29378569022287220736000,841159994641469927424000] |