n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 8 |
5 | 96 |
6 | 384 |
7 | 2304 |
8 | 4608 |
9 | 18432 |
10 | 552960 |
11 | 19906560 |
12 | 796262400 |
13 | 33443020800 |
14 | 66886041600 |
15 | 267544166400 |
16 | 535088332800 |
17 | 32105299968000 |
18 | 2118949797888000 |
19 | 148326485852160000 |
20 | 10679506981355520000 |
[1,1,2,4,8,96,384,2304,4608,18432,552960,19906560, 796262400,33443020800,66886041600,267544166400, 535088332800,32105299968000,2118949797888000, 148326485852160000,10679506981355520000] |