n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 10 |
4 | 40 |
5 | 196 |
6 | 1176 |
7 | 8352 |
8 | 66816 |
9 | 589248 |
10 | 5892480 |
11 | 67841280 |
12 | 814095360 |
13 | 9007096320 |
14 | 126099348480 |
15 | 3417110323200 |
16 | 54673765171200 |
17 | -1593137026252800 |
18 | -28676466472550400 |
19 | 6142121597716070400 |
20 | 122842431954321408000 |
21 | -24453765000305786880000 |
[1,2,3,10,40,196,1176,8352,66816,589248,5892480, 67841280,814095360,9007096320,126099348480, 3417110323200,54673765171200,-1593137026252800, -28676466472550400,6142121597716070400, 122842431954321408000,-24453765000305786880000] |