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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.

A191619 Least a such that (2^n-a)*2^n + 1 is a prime number.

Table of values

n a(n)
1 0
2 0
3 3
4 0
5 3
6 10
7 3
8 0
9 3
10 10
11 3
12 4
13 3
14 4
15 3
16 16
17 23
18 4
19 3
20 21
21 12
22 10
23 18
24 40
25 14
26 37
27 8
28 16
29 32
30 10
31 36
32 1
33 63
34 10
35 3
36 48
37 17
38 67
39 3
40 31
41 33
42 22
43 9
44 19
45 3
46 9
47 47
48 33
49 21
50 15
51 3
52 58
53 51
54 22
55 78
56 163
57 8
58 30
59 3
60 85
61 44
62 4
63 71
64 28
65 204
66 4
67 42
68 75
69 27
70 16
71 17

List of values

[0, 0, 3, 0, 3, 10, 3, 0, 3, 10, 3, 4, 3, 4, 3, 16, 23, 4, 3, 21, 12, 10, 18, 40, 14, 37, 8, 16, 32, 10, 36, 1, 63, 10, 3, 48, 17, 67, 3, 31, 33, 22, 9, 19, 3, 9, 47, 33, 21, 15, 3, 58, 51, 22, 78, 163, 8, 30, 3, 85, 44, 4, 71, 28, 204, 4, 42, 75, 27, 16, 17]

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

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