n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | -5 |
4 | 15 |
5 | -25 |
6 | 55 |
7 | -105 |
8 | 215 |
9 | -425 |
10 | 855 |
11 | -1705 |
12 | 3415 |
13 | -6825 |
14 | 13655 |
15 | -27305 |
16 | 54615 |
17 | -109225 |
18 | 218455 |
19 | -436905 |
20 | 873815 |
21 | -1747625 |
22 | 3495255 |
23 | -6990505 |
24 | 13981015 |
25 | -27962025 |
26 | 55924055 |
27 | -111848105 |
28 | 223696215 |
29 | -447392425 |
30 | 894784855 |
31 | -1789569705 |
32 | 3579139415 |
[1,0,5,-5,15,-25,55,-105,215,-425,855,-1705,3415, -6825,13655,-27305,54615,-109225,218455,-436905, 873815,-1747625,3495255,-6990505,13981015, -27962025,55924055,-111848105,223696215, -447392425,894784855,-1789569705,3579139415] |