cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A128145 Expansion of psi(q^3)* phi(-q^3)* chi^2(-q^3)/( psi(-q)* phi(-q^18)) in powers of q where phi(), psi(), chi() are Ramanujan theta functions.

Table of values

n a(n)
0 1
1 1
2 1
3 -1
4 0
5 1
6 0
7 -1
8 -1
9 2
10 0
11 -3
12 0
13 2
14 0
15 -3
16 0
17 5
18 0
19 -4
20 2
21 4
22 0
23 -5
24 0
25 7
26 -2
27 -7
28 0
29 5
30 0
31 -10
32 -1
33 12
34 0
35 -10
36 0
37 14
38 4
39 -17
40 0
41 21
42 0
43 -22
44 -4
45 24
46 0
47 -34
48 0
49 33
50 -1
51 -36
52 0
53 45
54 0
55 -45
56 8
57 52
58 0
59 -55
60 0
61 62
62 -8
63 -71
64 0
65 70
66 0
67 -88
68 -2
69 96
70 0
71 -98
72 0
73 122
74 14
75 -133
76 0
77 148
78 0
79 -163
80 -14
81 182
82 0
83 -217
84 0
85 216

List of values

[1, 1, 1, -1, 0, 1, 0, -1, -1, 2, 0, -3, 0, 2, 0, -3, 0, 5, 0, -4, 2, 4, 0, -5, 0, 7, -2, -7, 0, 5, 0, -10, -1, 12, 0, -10, 0, 14, 4, -17, 0, 21, 0, -22, -4, 24, 0, -34, 0, 33, -1, -36, 0, 45, 0, -45, 8, 52, 0, -55, 0, 62, -8, -71, 0, 70, 0, -88, -2, 96, 0, -98, 0, 122, 14, -133, 0, 148, 0, -163, -14, 182, 0, -217, 0, 216]