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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.

A181780 Numbers n which are Fermat pseudoprimes to some base b, 2 <= b <= n-2.

Table of values

n a(n)
1 15
2 21
3 25
4 28
5 33
6 35
7 39
8 45
9 49
10 51
11 52
12 55
13 57
14 63
15 65
16 66
17 69
18 70
19 75
20 76
21 77
22 85
23 87
24 91
25 93
26 95
27 99
28 105
29 111
30 112
31 115
32 117
33 119
34 121
35 123
36 124
37 125
38 129
39 130
40 133
41 135
42 141
43 143
44 145
45 147
46 148
47 153
48 154
49 155
50 159
51 161
52 165
53 169
54 171
55 172
56 175
57 176

List of values

[15, 21, 25, 28, 33, 35, 39, 45, 49, 51, 52, 55, 57, 63, 65, 66, 69, 70, 75, 76, 77, 85, 87, 91, 93, 95, 99, 105, 111, 112, 115, 117, 119, 121, 123, 124, 125, 129, 130, 133, 135, 141, 143, 145, 147, 148, 153, 154, 155, 159, 161, 165, 169, 171, 172, 175, 176]