n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | -1 |
3 | -1 |
4 | 2 |
5 | -1 |
6 | 4 |
7 | -5 |
8 | 7 |
9 | -8 |
10 | 10 |
11 | -15 |
12 | 18 |
13 | -22 |
14 | 26 |
15 | -37 |
16 | 46 |
17 | -53 |
18 | 66 |
19 | -84 |
20 | 104 |
21 | -122 |
22 | 148 |
23 | -183 |
24 | 224 |
25 | -263 |
26 | 312 |
27 | -379 |
28 | 454 |
29 | -531 |
30 | 626 |
31 | -750 |
32 | 887 |
33 | -1034 |
34 | 1208 |
35 | -1428 |
36 | 1672 |
37 | -1936 |
38 | 2250 |
39 | -2633 |
40 | 3062 |
41 | -3529 |
42 | 4076 |
43 | -4728 |
44 | 5460 |
45 | -6264 |
46 | 7196 |
47 | -8290 |
48 | 9520 |
49 | -10875 |
50 | 12431 |
51 | -14238 |
[1,-1,-1,-1,2,-1,4,-5,7,-8,10,-15,18,-22,26,-37, 46,-53,66,-84,104,-122,148,-183,224,-263,312,-379, 454,-531,626,-750,887,-1034,1208,-1428,1672,-1936, 2250,-2633,3062,-3529,4076,-4728,5460,-6264,7196, -8290,9520,-10875,12431,-14238] |