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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.

A168053 Expansion of (1-2*x^2-3*x^3)/((1-x)^2*(1+x+x^2)).

Table of values

n a(n)
0 1
1 1
2 -1
3 -3
4 -3
5 -5
6 -7
7 -7
8 -9
9 -11
10 -11
11 -13
12 -15
13 -15
14 -17
15 -19
16 -19
17 -21
18 -23
19 -23
20 -25
21 -27
22 -27
23 -29
24 -31
25 -31
26 -33
27 -35
28 -35
29 -37
30 -39
31 -39
32 -41
33 -43
34 -43
35 -45
36 -47
37 -47
38 -49
39 -51
40 -51
41 -53
42 -55
43 -55
44 -57
45 -59
46 -59
47 -61
48 -63
49 -63
50 -65
51 -67
52 -67
53 -69

List of values

[1, 1, -1, -3, -3, -5, -7, -7, -9, -11, -11, -13, -15, -15, -17, -19, -19, -21, -23, -23, -25, -27, -27, -29, -31, -31, -33, -35, -35, -37, -39, -39, -41, -43, -43, -45, -47, -47, -49, -51, -51, -53, -55, -55, -57, -59, -59, -61, -63, -63, -65, -67, -67, -69]

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