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.

A008438 Sum of divisors of 2*n + 1.

Table of values

n a(n)
0 1
1 4
2 6
3 8
4 13
5 12
6 14
7 24
8 18
9 20
10 32
11 24
12 31
13 40
14 30
15 32
16 48
17 48
18 38
19 56
20 42
21 44
22 78
23 48
24 57
25 72
26 54
27 72
28 80
29 60
30 62
31 104
32 84
33 68
34 96
35 72
36 74
37 124
38 96
39 80
40 121
41 84
42 108
43 120
44 90
45 112
46 128
47 120
48 98
49 156
50 102
51 104
52 192
53 108
54 110
55 152
56 114
57 144
58 182
59 144
60 133
61 168

List of values

[1, 4, 6, 8, 13, 12, 14, 24, 18, 20, 32, 24, 31, 40, 30, 32, 48, 48, 38, 56, 42, 44, 78, 48, 57, 72, 54, 72, 80, 60, 62, 104, 84, 68, 96, 72, 74, 124, 96, 80, 121, 84, 108, 120, 90, 112, 128, 120, 98, 156, 102, 104, 192, 108, 110, 152, 114, 144, 182, 144, 133, 168]