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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.

A364011 Expansion of Sum_{k>0} x^k / (1 + x^(3*k)).

Table of values

n a(n)
1 1
2 1
3 1
4 0
5 1
6 1
7 2
8 0
9 1
10 0
11 1
12 0
13 2
14 2
15 1
16 -1
17 1
18 1
19 2
20 -1
21 2
22 0
23 1
24 0
25 2
26 2
27 1
28 0
29 1
30 0
31 2
32 -1
33 1
34 0
35 2
36 0
37 2
38 2
39 2
40 -2
41 1
42 2
43 2
44 -1
45 1
46 0
47 1
48 -1
49 3
50 1
51 1
52 0
53 1
54 1
55 2
56 0
57 2
58 0
59 1
60 -1
61 2
62 2
63 2
64 -2
65 2
66 0
67 2
68 -1
69 1
70 0
71 1
72 0
73 2
74 2
75 2
76 0
77 2
78 2
79 2
80 -3
81 1
82 0
83 1
84 0
85 2
86 2
87 1
88 -2
89 1
90 0
91 4
92 -1
93 2
94 0

List of values

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