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.

A056853 Numbers n satisfying phi(n+1) - phi(n-1) = 2.

Table of values

n a(n)
1 4
2 6
3 7
4 12
5 13
6 15
7 18
8 19
9 21
10 30
11 42
12 45
13 60
14 63
15 72
16 93
17 102
18 108
19 117
20 138
21 150
22 165
23 180
24 192
25 198
26 213
27 228
28 240
29 255
30 270
31 282
32 312
33 333
34 348
35 357
36 420
37 432
38 453
39 462
40 522
41 525
42 570
43 600
44 618
45 642
46 660
47 693
48 717
49 765
50 810
51 822
52 828
53 858
54 882
55 933
56 957

List of values

[4, 6, 7, 12, 13, 15, 18, 19, 21, 30, 42, 45, 60, 63, 72, 93, 102, 108, 117, 138, 150, 165, 180, 192, 198, 213, 228, 240, 255, 270, 282, 312, 333, 348, 357, 420, 432, 453, 462, 522, 525, 570, 600, 618, 642, 660, 693, 717, 765, 810, 822, 828, 858, 882, 933, 957]