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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.

A156232 a(n) is the number of induced subgraphs with odd number of edges in the cycle graph C(n).

Table of values

n a(n)
2 0
3 4
4 4
5 16
6 24
7 64
8 112
9 256
10 480
11 1024
12 1984
13 4096
14 8064
15 16384
16 32512
17 65536
18 130560
19 262144
20 523264
21 1048576
22 2095104
23 4194304
24 8384512
25 16777216
26 33546240
27 67108864
28 134201344
29 268435456
30 536838144
31 1073741824
32 2147418112

List of values

[0, 4, 4, 16, 24, 64, 112, 256, 480, 1024, 1984, 4096, 8064, 16384, 32512, 65536, 130560, 262144, 523264, 1048576, 2095104, 4194304, 8384512, 16777216, 33546240, 67108864, 134201344, 268435456, 536838144, 1073741824, 2147418112]

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

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