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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.

A374137 Odd numbers k such that the cyclotomic polynomial Phi(k,x) has height 1, i.e., whose coefficients are all -1, 0, or 1.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 9
6 11
7 13
8 15
9 17
10 19
11 21
12 23
13 25
14 27
15 29
16 31
17 33
18 35
19 37
20 39
21 41
22 43
23 45
24 47
25 49
26 51
27 53
28 55
29 57
30 59
31 61
32 63
33 65
34 67
35 69
36 71
37 73
38 75
39 77
40 79
41 81
42 83
43 85
44 87
45 89
46 91
47 93
48 95
49 97
50 99
51 101
52 103
53 107
54 109
55 111
56 113
57 115
58 117
59 119
60 121
61 123
62 125
63 127
64 129
65 131
66 133
67 135
68 137
69 139
70 141
71 143
72 145
73 147
74 149
75 151

List of values

[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151]