cp's OEIS Frontend

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.

A127073 Composite numbers k that divide 3^k - 2^k - 1, excluding powers of 2, 3 and 7.

Table of values

n a(n)
1 45
2 245
3 405
4 561
5 637
6 639
7 833
8 891
9 1105
10 1377
11 1576
12 1729
13 2465
14 2701
15 2821
16 3321
17 3645
18 4753
19 5589
20 6345
21 6517
22 6601
23 7885
24 8911
25 10365
26 10585
27 12005
28 13833
29 15841
30 17152
31 17265
32 18179
33 18721
34 21141
35 23552
36 25681
37 26411
38 29341
39 31213
40 31621

List of values

[45, 245, 405, 561, 637, 639, 833, 891, 1105, 1377, 1576, 1729, 2465, 2701, 2821, 3321, 3645, 4753, 5589, 6345, 6517, 6601, 7885, 8911, 10365, 10585, 12005, 13833, 15841, 17152, 17265, 18179, 18721, 21141, 23552, 25681, 26411, 29341, 31213, 31621]

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

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