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.

A220160 Numbers n for which phi(n) = phi(n-1) - phi(n+1).

Table of values

n a(n)
1 194
2 3530
3 9338
4 27230
5 46794
6 78182
7 90194
8 112994
9 135014
10 437184
11 849404
12 935220
13 1078580
14 1283600
15 1986974
16 2209584
17 2341184
18 2411174
19 2689694
20 2744144
21 3619070
22 3712544
23 4738184
24 5132984
25 6596120
26 7829030
27 8184714
28 12176108
29 12292004
30 13342958
31 26400842

List of values

[194, 3530, 9338, 27230, 46794, 78182, 90194, 112994, 135014, 437184, 849404, 935220, 1078580, 1283600, 1986974, 2209584, 2341184, 2411174, 2689694, 2744144, 3619070, 3712544, 4738184, 5132984, 6596120, 7829030, 8184714, 12176108, 12292004, 13342958, 26400842]