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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.

A239708 Numbers of the form m = 2^i + 2^j, where i > j >= 0, such that m - 1 is prime.

Table of values

n a(n)
1 3
2 6
3 12
4 18
5 20
6 24
7 48
8 68
9 72
10 80
11 132
12 192
13 258
14 264
15 272
16 384
17 1032
18 1040
19 1088
20 1152
21 1280
22 2064
23 2112
24 4100
25 4112
26 4128
27 4160
28 5120
29 6144
30 8448
31 16448
32 20480
33 32772
34 32784
35 32832
36 33024
37 33792
38 65538
39 65540
40 65544
41 65552
42 65600
43 66048
44 73728
45 81920
46 262148
47 262152
48 262272
49 262400
50 263168
51 266240
52 294912
53 524352
54 528384
55 786432

List of values

[3, 6, 12, 18, 20, 24, 48, 68, 72, 80, 132, 192, 258, 264, 272, 384, 1032, 1040, 1088, 1152, 1280, 2064, 2112, 4100, 4112, 4128, 4160, 5120, 6144, 8448, 16448, 20480, 32772, 32784, 32832, 33024, 33792, 65538, 65540, 65544, 65552, 65600, 66048, 73728, 81920, 262148, 262152, 262272, 262400, 263168, 266240, 294912, 524352, 528384, 786432]

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

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