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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.

A113402 Algebraic degree of cos(Pi/n) for constructible n-gons (A003401).

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 2
6 2
7 4
8 4
9 4
10 4
11 8
12 8
13 8
14 8
15 8
16 16
17 16
18 16
19 16
20 16
21 16
22 32
23 32
24 32
25 32
26 32
27 32
28 32
29 64
30 64
31 64
32 64
33 64
34 64
35 64
36 64
37 128
38 128
39 128
40 128
41 128
42 128
43 128
44 128
45 128
46 256
47 256
48 256
49 256
50 256
51 256
52 256
53 256
54 256
55 256
56 512
57 512
58 512
59 512
60 512
61 512
62 512
63 512
64 512

List of values

[1, 1, 1, 2, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 8, 16, 16, 16, 16, 16, 16, 32, 32, 32, 32, 32, 32, 32, 64, 64, 64, 64, 64, 64, 64, 64, 128, 128, 128, 128, 128, 128, 128, 128, 128, 256, 256, 256, 256, 256, 256, 256, 256, 256, 256, 512, 512, 512, 512, 512, 512, 512, 512, 512]

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

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