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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.

A164858 a(n) = largest prime dividing A164857(n). a(1)=1.

Table of values

n a(n)
1 1
2 2
3 3
4 2
5 5
6 3
7 7
8 2
9 5
10 13
11 13
12 3
13 19
14 7
15 5
16 2
17 23
18 3
19 31
20 7
21 37
22 37
23 37
24 3
25 43
26 43
27 43
28 43
29 43
30 5
31 53
32 2
33 61
34 61
35 7
36 3
37 61
38 73
39 73
40 73
41 73
42 79
43 79
44 83
45 83
46 83
47 83
48 3
49 89
50 89
51 89
52 89
53 89
54 3
55 103
56 103
57 103
58 103
59 103
60 5
61 113
62 113
63 13
64 2
65 113
66 113
67 113
68 131
69 131
70 131
71 131
72 3
73 139

List of values

[1, 2, 3, 2, 5, 3, 7, 2, 5, 13, 13, 3, 19, 7, 5, 2, 23, 3, 31, 7, 37, 37, 37, 3, 43, 43, 43, 43, 43, 5, 53, 2, 61, 61, 7, 3, 61, 73, 73, 73, 73, 79, 79, 83, 83, 83, 83, 3, 89, 89, 89, 89, 89, 3, 103, 103, 103, 103, 103, 5, 113, 113, 13, 2, 113, 113, 113, 131, 131, 131, 131, 3, 139]

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

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