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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.

A214415 Numbers n such that prevprime(2^n) AND nextprime(2^n) = 1, where AND is the bitwise AND operator.

Table of values

n a(n)
0 2
1 4
2 6
3 8
4 12
5 15
6 16
7 23
8 25
9 30
10 37
11 53
12 55
13 57
14 67
15 75
16 76
17 81
18 82
19 84
20 95
21 108
22 129
23 132
24 135
25 139
26 143
27 155
28 160
29 163
30 180
31 181
32 188
33 192
34 203
35 204
36 210
37 222
38 244
39 263
40 273
41 277
42 280
43 287
44 289
45 295
46 297
47 308
48 315
49 319
50 325
51 330
52 341
53 367
54 370
55 393
56 394
57 406

List of values

[2, 4, 6, 8, 12, 15, 16, 23, 25, 30, 37, 53, 55, 57, 67, 75, 76, 81, 82, 84, 95, 108, 129, 132, 135, 139, 143, 155, 160, 163, 180, 181, 188, 192, 203, 204, 210, 222, 244, 263, 273, 277, 280, 287, 289, 295, 297, 308, 315, 319, 325, 330, 341, 367, 370, 393, 394, 406]

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

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