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.

A071324 Alternating sum of all divisors of n; divisors nonincreasing, starting with n.

Table of values

n a(n)
1 1
2 1
3 2
4 3
5 4
6 4
7 6
8 5
9 7
10 6
11 10
12 8
13 12
14 8
15 12
16 11
17 16
18 13
19 18
20 12
21 16
22 12
23 22
24 16
25 21
26 14
27 20
28 18
29 28
30 22
31 30
32 21
33 24
34 18
35 32
36 25
37 36
38 20
39 28
40 24
41 40
42 32
43 42
44 30
45 36
46 24
47 46
48 32
49 43
50 31
51 36
52 36
53 52
54 40
55 48
56 38
57 40
58 30
59 58
60 40
61 60
62 32
63 46
64 43
65 56
66 48
67 66
68 48
69 48
70 42
71 70
72 49
73 72

List of values

[1, 1, 2, 3, 4, 4, 6, 5, 7, 6, 10, 8, 12, 8, 12, 11, 16, 13, 18, 12, 16, 12, 22, 16, 21, 14, 20, 18, 28, 22, 30, 21, 24, 18, 32, 25, 36, 20, 28, 24, 40, 32, 42, 30, 36, 24, 46, 32, 43, 31, 36, 36, 52, 40, 48, 38, 40, 30, 58, 40, 60, 32, 46, 43, 56, 48, 66, 48, 48, 42, 70, 49, 72]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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