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.

A079537 a(n) = phi(2*n+1)*d(2*n+1) - sigma(2*n+1).

Table of values

n a(n)
0 0
1 0
2 2
3 4
4 5
5 8
6 10
7 8
8 14
9 16
10 16
11 20
12 29
13 32
14 26
15 28
16 32
17 48
18 34
19 40
20 38
21 40
22 66
23 44
24 69
25 56
26 50
27 88
28 64
29 56
30 58
31 112
32 108
33 64
34 80
35 68
36 70
37 116
38 144
39 76
40 149
41 80
42 148
43 104
44 86
45 176
46 112
47 168
48 94
49 204
50 98
51 100
52 192
53 104
54 106
55 136
56 110
57 208
58 250
59 240
60 197
61 152
62 244
63 124
64 160

List of values

[0, 0, 2, 4, 5, 8, 10, 8, 14, 16, 16, 20, 29, 32, 26, 28, 32, 48, 34, 40, 38, 40, 66, 44, 69, 56, 50, 88, 64, 56, 58, 112, 108, 64, 80, 68, 70, 116, 144, 76, 149, 80, 148, 104, 86, 176, 112, 168, 94, 204, 98, 100, 192, 104, 106, 136, 110, 208, 250, 240, 197, 152, 244, 124, 160]