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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.

A084100 Expansion of (1+x-x^2-x^3)/(1+x^2).

Table of values

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

List of values

[1, 1, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2, -2, 2, 2, -2]

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