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A258590 Expansion of psi(-x) * psi(-x^6)^2 / f(-x^3) in powers of x where psi(), f() are Ramanujan theta functions.

Table of values

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

List of values

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

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