n | a(n) |
---|---|
1 | 0 |
2 | -1 |
3 | -3 |
4 | 1 |
5 | -5 |
6 | -7 |
7 | 2 |
8 | 3 |
9 | -9 |
10 | 5 |
11 | 7 |
12 | -11 |
13 | 4 |
14 | -13 |
15 | 9 |
16 | -15 |
17 | 6 |
18 | 8 |
19 | 11 |
20 | -17 |
21 | 10 |
22 | 13 |
23 | -19 |
24 | 15 |
25 | 17 |
26 | -21 |
27 | -23 |
28 | -25 |
29 | 12 |
30 | 14 |
31 | -27 |
32 | -29 |
33 | 19 |
34 | -31 |
35 | 16 |
36 | 18 |
37 | 21 |
38 | -33 |
39 | -35 |
40 | 20 |
41 | 23 |
42 | -37 |
43 | 25 |
44 | 22 |
45 | -39 |
46 | 24 |
47 | 26 |
48 | 28 |
49 | -41 |
50 | -43 |
51 | -45 |
52 | -47 |
53 | 27 |
54 | 29 |
55 | -49 |
56 | -2 |
57 | -51 |
58 | -53 |
59 | 31 |
60 | -55 |
61 | -57 |
62 | 30 |
63 | 32 |
64 | 33 |
65 | -59 |
66 | -61 |
67 | 34 |
68 | 35 |
69 | -63 |
70 | -65 |
71 | 37 |
72 | 39 |
73 | -67 |
74 | 36 |
75 | -69 |
76 | -71 |
77 | 38 |
78 | -73 |
79 | 41 |
80 | -75 |
81 | 40 |
[0,-1,-3,1,-5,-7,2,3,-9,5,7,-11,4,-13,9,-15,6,8, 11,-17,10,13,-19,15,17,-21,-23,-25,12,14,-27,-29, 19,-31,16,18,21,-33,-35,20,23,-37,25,22,-39,24,26, 28,-41,-43,-45,-47,27,29,-49,-2,-51,-53,31,-55, -57,30,32,33,-59,-61,34,35,-63,-65,37,39,-67,36, -69,-71,38,-73,41,-75,40] |