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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.

A086369 Number of factors over Q in the factorization of T_n(x) - 1 where T_n(x) is the Chebyshev polynomial of the first kind.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 3
6 6
7 3
8 6
9 5
10 6
11 3
12 10
13 3
14 6
15 7
16 8
17 3
18 10
19 3
20 10
21 7
22 6
23 3
24 14
25 5
26 6
27 7
28 10
29 3
30 14
31 3
32 10
33 7
34 6
35 7
36 16
37 3
38 6
39 7
40 14
41 3
42 14
43 3
44 10
45 11
46 6
47 3
48 18
49 5
50 10
51 7
52 10
53 3
54 14
55 7
56 14
57 7
58 6
59 3
60 22
61 3
62 6
63 11
64 12
65 7
66 14
67 3
68 10
69 7
70 14
71 3
72 22
73 3
74 6
75 11
76 10
77 7
78 14
79 3
80 18

List of values

[1, 2, 3, 4, 3, 6, 3, 6, 5, 6, 3, 10, 3, 6, 7, 8, 3, 10, 3, 10, 7, 6, 3, 14, 5, 6, 7, 10, 3, 14, 3, 10, 7, 6, 7, 16, 3, 6, 7, 14, 3, 14, 3, 10, 11, 6, 3, 18, 5, 10, 7, 10, 3, 14, 7, 14, 7, 6, 3, 22, 3, 6, 11, 12, 7, 14, 3, 10, 7, 14, 3, 22, 3, 6, 11, 10, 7, 14, 3, 18]

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