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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.

A087554 a(n) = smallest number k >= n such that nk + 1 is a prime.

Table of values

n a(n)
1 1
2 2
3 4
4 4
5 6
6 6
7 10
8 9
9 12
10 10
11 18
12 13
13 24
14 14
15 16
16 16
17 18
18 21
19 22
20 20
21 22
22 28
23 26
24 24
25 28
26 26
27 28
28 34
29 32
30 33
31 36
32 36
33 34
34 37
35 42
36 36
37 40
38 39
39 48
40 40
41 42
42 46
43 46
44 47
45 48
46 51
47 50
48 54
49 52
50 51
51 56
52 55
53 56
54 54
55 58
56 56
57 58
58 61
59 60
60 67
61 66
62 63
63 66
64 67
65 68
66 66
67 70
68 75
69 70
70 79
71 72
72 79

List of values

[1, 2, 4, 4, 6, 6, 10, 9, 12, 10, 18, 13, 24, 14, 16, 16, 18, 21, 22, 20, 22, 28, 26, 24, 28, 26, 28, 34, 32, 33, 36, 36, 34, 37, 42, 36, 40, 39, 48, 40, 42, 46, 46, 47, 48, 51, 50, 54, 52, 51, 56, 55, 56, 54, 58, 56, 58, 61, 60, 67, 66, 63, 66, 67, 68, 66, 70, 75, 70, 79, 72, 79]

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

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