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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.

A090132 Expansion of (1+2*x)/(1+2*x+2*x^2).

Table of values

n a(n)
0 1
1 0
2 -2
3 4
4 -4
5 0
6 8
7 -16
8 16
9 0
10 -32
11 64
12 -64
13 0
14 128
15 -256
16 256
17 0
18 -512
19 1024
20 -1024
21 0
22 2048
23 -4096
24 4096
25 0
26 -8192
27 16384
28 -16384
29 0
30 32768
31 -65536
32 65536
33 0
34 -131072
35 262144
36 -262144
37 0
38 524288
39 -1048576
40 1048576
41 0
42 -2097152
43 4194304
44 -4194304
45 0
46 8388608

List of values

[1, 0, -2, 4, -4, 0, 8, -16, 16, 0, -32, 64, -64, 0, 128, -256, 256, 0, -512, 1024, -1024, 0, 2048, -4096, 4096, 0, -8192, 16384, -16384, 0, 32768, -65536, 65536, 0, -131072, 262144, -262144, 0, 524288, -1048576, 1048576, 0, -2097152, 4194304, -4194304, 0, 8388608]

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

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