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.

A055940 Counterbalanced numbers: Composite numbers k such that phi(k)/(sigma(k)-k) is an integer.

Table of values

n a(n)
1 133
2 403
3 583
4 713
5 817
6 2077
7 2623
8 2923
9 4453
10 4717
11 5311
12 5773
13 7093
14 7747
15 9313
16 11023
17 11581
18 11653
19 12877
20 14353
21 15553
22 19303
23 20803
24 21409
25 21733
26 21971
27 24307
28 31169
29 35033
30 39283
31 39337
32 43873
33 46297
34 46357
35 50573
36 50879
37 53863

List of values

[133, 403, 583, 713, 817, 2077, 2623, 2923, 4453, 4717, 5311, 5773, 7093, 7747, 9313, 11023, 11581, 11653, 12877, 14353, 15553, 19303, 20803, 21409, 21733, 21971, 24307, 31169, 35033, 39283, 39337, 43873, 46297, 46357, 50573, 50879, 53863]

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

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