n | a(n) |
---|---|
0 | 1 |
1 | -5 |
2 | 15 |
3 | -35 |
4 | 70 |
5 | -125 |
6 | 200 |
7 | -275 |
8 | 275 |
9 | 0 |
10 | -1000 |
11 | 3625 |
12 | -9500 |
13 | 21250 |
14 | -42500 |
15 | 76875 |
16 | -124375 |
17 | 171875 |
18 | -171875 |
19 | 0 |
20 | 621875 |
21 | -2250000 |
22 | 5890625 |
23 | -13171875 |
24 | 26343750 |
25 | -47656250 |
26 | 77109375 |
27 | -106562500 |
28 | 106562500 |
29 | 0 |
[1,-5,15,-35,70,-125,200,-275,275,0,-1000,3625, -9500,21250,-42500,76875,-124375,171875,-171875,0, 621875,-2250000,5890625,-13171875,26343750, -47656250,77109375,-106562500,106562500,0] |