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.

A067701 Numbers n such that phi(n-1) + phi(n+1) = phi(2n).

Table of values

n a(n)
1 5
2 7
3 25
4 77
5 217
6 305
7 3665
8 4645
9 5065
10 8815
11 12205
12 12545
13 19877
14 20435
15 24235
16 29545
17 37735
18 47995
19 60115
20 72085
21 73025
22 77045
23 87475
24 121145
25 126055
26 129245
27 149755
28 190267
29 234635
30 247855
31 273295
32 275723
33 419365
34 531235
35 553475
36 621725
37 774485
38 840085

List of values

[5, 7, 25, 77, 217, 305, 3665, 4645, 5065, 8815, 12205, 12545, 19877, 20435, 24235, 29545, 37735, 47995, 60115, 72085, 73025, 77045, 87475, 121145, 126055, 129245, 149755, 190267, 234635, 247855, 273295, 275723, 419365, 531235, 553475, 621725, 774485, 840085]