n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | -3 |
3 | -15 |
4 | 45 |
5 | 315 |
6 | -1575 |
7 | -14175 |
8 | 99225 |
9 | 1091475 |
10 | -9823275 |
11 | -127702575 |
12 | 1404728325 |
13 | 21070924875 |
14 | -273922023375 |
15 | -4656674397375 |
16 | 69850115960625 |
17 | 1327152203251875 |
18 | -22561587455281875 |
19 | -473793336560919375 |
[1,3,-3,-15,45,315,-1575,-14175,99225,1091475, -9823275,-127702575,1404728325,21070924875, -273922023375,-4656674397375,69850115960625, 1327152203251875,-22561587455281875, -473793336560919375] |