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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.

A055689 Numbers k such that 6^k == -1 (mod k-1).

Table of values

n a(n)
1 2
2 38
3 16987850
4 2416266950
5 5995229030
6 7193673830
7 11465419550
8 17783484530
9 72155530502
10 142013229530
11 174523785590
12 189282539138
13 294183810998
14 302690164298
15 354613312130
16 774557575610
17 933821938790
18 1407294504938
19 1974020768390
20 2112969494570
21 2878251281402
22 3239815009970
23 3756030401750
24 3915556797110
25 6086837726270
26 6154479362702
27 6760841132870
28 7412805544190
29 7430816963570
30 10197159330050
31 12162461471270
32 15374128532210
33 15561152727890
34 17132853402170
35 17728631282570
36 25843631671550
37 38138222902514
38 39974191417010
39 56482483860710
40 71475592618370
41 78107027121482

List of values

[2, 38, 16987850, 2416266950, 5995229030, 7193673830, 11465419550, 17783484530, 72155530502, 142013229530, 174523785590, 189282539138, 294183810998, 302690164298, 354613312130, 774557575610, 933821938790, 1407294504938, 1974020768390, 2112969494570, 2878251281402, 3239815009970, 3756030401750, 3915556797110, 6086837726270, 6154479362702, 6760841132870, 7412805544190, 7430816963570, 10197159330050, 12162461471270, 15374128532210, 15561152727890, 17132853402170, 17728631282570, 25843631671550, 38138222902514, 39974191417010, 56482483860710, 71475592618370, 78107027121482]

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