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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.

A071190 Greatest prime factor of sum of divisors of n, for n >= 2; a(1) = 1.

Table of values

n a(n)
1 1
2 3
3 2
4 7
5 3
6 3
7 2
8 5
9 13
10 3
11 3
12 7
13 7
14 3
15 3
16 31
17 3
18 13
19 5
20 7
21 2
22 3
23 3
24 5
25 31
26 7
27 5
28 7
29 5
30 3
31 2
32 7
33 3
34 3
35 3
36 13
37 19
38 5
39 7
40 5
41 7
42 3
43 11
44 7
45 13
46 3
47 3
48 31
49 19
50 31
51 3
52 7
53 3
54 5
55 3
56 5
57 5
58 5
59 5
60 7
61 31
62 3
63 13
64 127
65 7
66 3
67 17
68 7
69 3
70 3
71 3
72 13
73 37
74 19
75 31
76 7
77 3
78 7
79 5
80 31

List of values

[1, 3, 2, 7, 3, 3, 2, 5, 13, 3, 3, 7, 7, 3, 3, 31, 3, 13, 5, 7, 2, 3, 3, 5, 31, 7, 5, 7, 5, 3, 2, 7, 3, 3, 3, 13, 19, 5, 7, 5, 7, 3, 11, 7, 13, 3, 3, 31, 19, 31, 3, 7, 3, 5, 3, 5, 5, 5, 5, 7, 31, 3, 13, 127, 7, 3, 17, 7, 3, 3, 3, 13, 37, 19, 31, 7, 3, 7, 5, 31]

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