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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.

A358699 a(n) is the largest prime factor of 2^(prime(n) - 1) - 1.

Table of values

n a(n)
2 3
3 5
4 7
5 31
6 13
7 257
8 73
9 683
10 127
11 331
12 109
13 61681
14 5419
15 2796203
16 8191
17 3033169
18 1321
19 599479
20 122921
21 38737
22 22366891
23 8831418697
24 2931542417
25 22253377
26 268501
27 131071
28 28059810762433
29 279073
30 54410972897
31 77158673929
32 145295143558111
33 2879347902817
34 10052678938039

List of values

[3, 5, 7, 31, 13, 257, 73, 683, 127, 331, 109, 61681, 5419, 2796203, 8191, 3033169, 1321, 599479, 122921, 38737, 22366891, 8831418697, 2931542417, 22253377, 268501, 131071, 28059810762433, 279073, 54410972897, 77158673929, 145295143558111, 2879347902817, 10052678938039]

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

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