n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 120 |
6 | 474 |
7 | -3500 |
8 | -169744 |
9 | -4739628 |
10 | -122528220 |
11 | -3244006128 |
12 | -89971866744 |
13 | -2643601630488 |
14 | -82449886989120 |
15 | -2730313541889120 |
16 | -95853665484598656 |
17 | -3561107748108889344 |
18 | -139703010646898138688 |
19 | -5774800668716738596896 |
20 | -250987866830927324395200 |
[0,1,2,6,26,120,474,-3500,-169744,-4739628, -122528220,-3244006128,-89971866744, -2643601630488,-82449886989120,-2730313541889120, -95853665484598656,-3561107748108889344, -139703010646898138688,-5774800668716738596896, -250987866830927324395200] |