n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 40 |
3 | 320 |
4 | 21504 |
5 | 688128 |
6 | 178257920 |
7 | 22817013760 |
8 | 23433341566976 |
9 | 11997870882291712 |
10 | 49179307930885816320 |
11 | 100719222642454151823360 |
12 | 1650485975228872480767606784 |
13 | 13520781109074923362448234774528 |
[1,2,40,320,21504,688128,178257920,22817013760, 23433341566976,11997870882291712, 49179307930885816320,100719222642454151823360, 1650485975228872480767606784, 13520781109074923362448234774528] |