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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.

A138928 Indices n such that A020501(n) = phi(n)(-2) is prime, where Phi is a cyclotomic polynomial.

Table of values

n a(n)
1 3
2 4
3 5
4 6
5 7
6 8
7 10
8 11
9 12
10 13
11 14
12 15
13 16
14 17
15 18
16 19
17 21
18 23
19 24
20 26
21 30
22 31
23 32
24 34
25 38
26 39
27 40
28 43
29 45
30 49
31 54
32 56
33 61
34 62
35 63
36 66
37 75
38 79
39 80
40 85
41 87
42 98
43 101
44 117
45 120
46 122
47 127
48 130
49 138
50 154
51 161
52 167
53 170
54 178
55 183
56 184
57 186
58 187
59 191
60 192
61 199
62 205
63 207
64 208

List of values

[3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 23, 24, 26, 30, 31, 32, 34, 38, 39, 40, 43, 45, 49, 54, 56, 61, 62, 63, 66, 75, 79, 80, 85, 87, 98, 101, 117, 120, 122, 127, 130, 138, 154, 161, 167, 170, 178, 183, 184, 186, 187, 191, 192, 199, 205, 207, 208]

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