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A339701 Dirichlet g.f.: Product_{k>=2} (1 - k^(-s))^2.

Table of values

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

List of values

[1, -2, -2, -1, -2, 2, -2, 2, -1, 2, -2, 4, -2, 2, 2, 1, -2, 4, -2, 4, 2, 2, -2, 0, -1, 2, 2, 4, -2, 2, -2, 2, 2, 2, 2, 0, -2, 2, 2, 0, -2, 2, -2, 4, 4, 2, -2, -2, -1, 4, 2, 4, -2, 0, 2, 0, 2, 2, -2, -4, -2, 2, 4, -2, 2, 2, -2, 4, 2, 2, -2, -4, -2, 2, 4, 4, 2, 2, -2, -2]

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