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.

A083255 Odd composite numbers k such that cototient(k) - phi(k) = k - 2*phi(k) is an odd prime.

Table of values

n a(n)
1 165
2 195
3 5187
4 5865
5 7395
6 10005
7 15045
8 16215
9 21165
10 22695
11 27285
12 37995
13 42585
14 44115
15 50235
16 57885
17 59415
18 60945
19 64005
20 310845
21 346035
22 347565
23 486795
24 635205
25 707115
26 890445
27 979455
28 994755
29 1049835
30 1070535
31 1078815
32 1083585
33 1121745

List of values

[165, 195, 5187, 5865, 7395, 10005, 15045, 16215, 21165, 22695, 27285, 37995, 42585, 44115, 50235, 57885, 59415, 60945, 64005, 310845, 346035, 347565, 486795, 635205, 707115, 890445, 979455, 994755, 1049835, 1070535, 1078815, 1083585, 1121745]

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

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