n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | 0 |
4 | 2 |
5 | -2 |
6 | 0 |
7 | 3 |
8 | -3 |
9 | 0 |
10 | 4 |
11 | -4 |
12 | 0 |
13 | 5 |
14 | -5 |
15 | 0 |
16 | 6 |
17 | -6 |
18 | 0 |
19 | 7 |
20 | -7 |
21 | 0 |
22 | 8 |
23 | -8 |
24 | 0 |
25 | 9 |
26 | -9 |
27 | 0 |
28 | 10 |
29 | -10 |
30 | 0 |
31 | 11 |
32 | -11 |
33 | 0 |
34 | 12 |
35 | -12 |
36 | 0 |
37 | 13 |
38 | -13 |
39 | 0 |
40 | 14 |
41 | -14 |
42 | 0 |
43 | 15 |
44 | -15 |
45 | 0 |
46 | 16 |
47 | -16 |
48 | 0 |
49 | 17 |
50 | -17 |
51 | 0 |
52 | 18 |
53 | -18 |
54 | 0 |
55 | 19 |
56 | -19 |
[0,1,-1,0,2,-2,0,3,-3,0,4,-4,0,5,-5,0,6,-6,0,7,-7, 0,8,-8,0,9,-9,0,10,-10,0,11,-11,0,12,-12,0,13,-13, 0,14,-14,0,15,-15,0,16,-16,0,17,-17,0,18,-18,0,19, -19] |