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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.

A138188 Expansion of (1 - 2*x - 2*x^2 - x^3)/(1 + x + x^2 - x^3 - x^4 - x^5).

Table of values

n a(n)
0 1
1 -3
2 0
3 3
4 -5
5 0
6 5
7 -7
8 0
9 7
10 -9
11 0
12 9
13 -11
14 0
15 11
16 -13
17 0
18 13
19 -15
20 0
21 15
22 -17
23 0
24 17
25 -19
26 0
27 19
28 -21
29 0
30 21
31 -23
32 0
33 23
34 -25
35 0
36 25
37 -27
38 0
39 27
40 -29
41 0
42 29
43 -31
44 0
45 31
46 -33
47 0
48 33
49 -35
50 0
51 35
52 -37
53 0
54 37
55 -39
56 0
57 39
58 -41
59 0
60 41

List of values

[1, -3, 0, 3, -5, 0, 5, -7, 0, 7, -9, 0, 9, -11, 0, 11, -13, 0, 13, -15, 0, 15, -17, 0, 17, -19, 0, 19, -21, 0, 21, -23, 0, 23, -25, 0, 25, -27, 0, 27, -29, 0, 29, -31, 0, 31, -33, 0, 33, -35, 0, 35, -37, 0, 37, -39, 0, 39, -41, 0, 41]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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