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A134343 Expansion of psi(-x)^2 in powers of x where psi() is a Ramanujan theta function.

Table of values

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

List of values

[1, -2, 1, -2, 2, 0, 3, -2, 0, -2, 2, -2, 1, -2, 0, -2, 4, 0, 2, 0, 1, -4, 2, 0, 2, -2, 0, -2, 2, -2, 1, -4, 0, 0, 2, 0, 4, -2, 2, -2, 0, 0, 3, -2, 0, -2, 4, 0, 2, -2, 0, -4, 0, 0, 0, -4, 3, -2, 2, 0, 2, -2, 0, 0, 2, -2, 4, -2, 0, -2, 2, 0, 3, -2, 0, 0, 4, 0, 2]

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