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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.

A341643 The unique strictly superior prime divisor of each number that has one.

Table of values

n a(n)
1 2
2 3
3 5
4 3
5 7
6 5
7 11
8 13
9 7
10 5
11 17
12 19
13 5
14 7
15 11
16 23
17 13
18 7
19 29
20 31
21 11
22 17
23 7
24 37
25 19
26 13
27 41
28 7
29 43
30 11
31 23
32 47
33 17
34 13
35 53
36 11
37 19
38 29
39 59
40 61
41 31
42 13
43 11
44 67
45 17
46 23
47 71
48 73
49 37
50 19
51 11
52 13
53 79
54 41
55 83
56 17
57 43
58 29
59 11
60 89
61 13
62 23
63 31
64 47
65 19
66 97
67 11
68 101

List of values

[2, 3, 5, 3, 7, 5, 11, 13, 7, 5, 17, 19, 5, 7, 11, 23, 13, 7, 29, 31, 11, 17, 7, 37, 19, 13, 41, 7, 43, 11, 23, 47, 17, 13, 53, 11, 19, 29, 59, 61, 31, 13, 11, 67, 17, 23, 71, 73, 37, 19, 11, 13, 79, 41, 83, 17, 43, 29, 11, 89, 13, 23, 31, 47, 19, 97, 11, 101]

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

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