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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.

A087349 a(n) = n + (smallest prime-factor of n+1).

Table of values

n a(n)
1 3
2 5
3 5
4 9
5 7
6 13
7 9
8 11
9 11
10 21
11 13
12 25
13 15
14 17
15 17
16 33
17 19
18 37
19 21
20 23
21 23
22 45
23 25
24 29
25 27
26 29
27 29
28 57
29 31
30 61
31 33
32 35
33 35
34 39
35 37
36 73
37 39
38 41
39 41
40 81
41 43
42 85
43 45
44 47
45 47
46 93
47 49
48 55
49 51
50 53
51 53
52 105
53 55
54 59
55 57
56 59
57 59
58 117
59 61
60 121
61 63
62 65
63 65
64 69
65 67
66 133
67 69
68 71
69 71

List of values

[3, 5, 5, 9, 7, 13, 9, 11, 11, 21, 13, 25, 15, 17, 17, 33, 19, 37, 21, 23, 23, 45, 25, 29, 27, 29, 29, 57, 31, 61, 33, 35, 35, 39, 37, 73, 39, 41, 41, 81, 43, 85, 45, 47, 47, 93, 49, 55, 51, 53, 53, 105, 55, 59, 57, 59, 59, 117, 61, 121, 63, 65, 65, 69, 67, 133, 69, 71, 71]

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

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