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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.

A181781 Numbers n that are Euler pseudoprimes to some base b, 2 <= b <= n-2.

Table of values

n a(n)
1 21
2 25
3 33
4 45
5 49
6 57
7 65
8 69
9 77
10 85
11 91
12 93
13 105
14 117
15 121
16 125
17 129
18 133
19 141
20 145
21 153
22 161
23 165
24 169
25 175
26 177
27 185
28 189
29 201
30 205
31 209
32 213
33 217
34 221
35 225
36 231
37 237
38 245
39 247
40 249
41 253
42 259
43 261
44 265
45 273
46 285
47 289
48 297
49 301
50 305
51 309
52 321
53 325
54 329
55 333
56 341
57 343
58 345

List of values

[21, 25, 33, 45, 49, 57, 65, 69, 77, 85, 91, 93, 105, 117, 121, 125, 129, 133, 141, 145, 153, 161, 165, 169, 175, 177, 185, 189, 201, 205, 209, 213, 217, 221, 225, 231, 237, 245, 247, 249, 253, 259, 261, 265, 273, 285, 289, 297, 301, 305, 309, 321, 325, 329, 333, 341, 343, 345]

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

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