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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.

A285808 a(n) = smallest k such that (6*k-3)*2^n-1 is prime.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 5
9 8
10 3
11 1
12 15
13 2
14 3
15 2
16 8
17 3
18 1
19 9
20 10
21 2
22 6
23 12
24 7
25 10
26 10
27 4
28 5
29 8
30 36
31 3
32 10
33 25
34 1
35 6
36 8
37 4
38 1
39 11
40 20
41 3
42 6
43 1
44 10
45 28
46 6
47 36
48 20
49 12
50 15
51 4
52 31
53 25
54 8
55 1
56 6
57 9
58 19
59 8
60 16
61 12
62 10
63 2
64 1
65 17
66 11
67 19
68 11
69 9
70 5
71 21
72 22
73 3
74 4
75 13
76 1

List of values

[1, 1, 1, 1, 3, 1, 1, 5, 8, 3, 1, 15, 2, 3, 2, 8, 3, 1, 9, 10, 2, 6, 12, 7, 10, 10, 4, 5, 8, 36, 3, 10, 25, 1, 6, 8, 4, 1, 11, 20, 3, 6, 1, 10, 28, 6, 36, 20, 12, 15, 4, 31, 25, 8, 1, 6, 9, 19, 8, 16, 12, 10, 2, 1, 17, 11, 19, 11, 9, 5, 21, 22, 3, 4, 13, 1]

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

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