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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.

A338048 a(n) is the smallest number that is not less than n such that n*a(n)+2 is semiprime.

Table of values

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

List of values

[2, 2, 4, 5, 11, 6, 7, 9, 13, 12, 11, 12, 19, 16, 19, 17, 17, 18, 20, 21, 23, 30, 24, 26, 32, 34, 27, 30, 29, 36, 37, 36, 35, 36, 35, 41, 37, 40, 43, 41, 43, 42, 43, 45, 47, 50, 48, 48, 51, 52, 51, 57, 53, 54, 55, 57, 59, 60, 61, 60, 63, 76, 64, 65, 65, 66, 75]

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

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