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.

A347130 a(n) = Sum_{d|n} d * A003415(n/d), where A003415 is the arithmetic derivative.

Table of values

n a(n)
1 0
2 1
3 1
4 6
5 1
6 10
7 1
8 24
9 9
10 14
11 1
12 48
13 1
14 18
15 16
16 80
17 1
18 63
19 1
20 72
21 20
22 26
23 1
24 176
25 15
26 30
27 54
28 96
29 1
30 124
31 1
32 240
33 28
34 38
35 24
36 270
37 1
38 42
39 32
40 272
41 1
42 164
43 1
44 144
45 117
46 50
47 1
48 560
49 21
50 135
51 40
52 168
53 1
54 324
55 32
56 368
57 44
58 62
59 1
60 552
61 1
62 66
63 153
64 672
65 36
66 244
67 1
68 216
69 52
70 236
71 1
72 936
73 1
74 78
75 165
76 240
77 36
78 284
79 1
80 880

List of values

[0, 1, 1, 6, 1, 10, 1, 24, 9, 14, 1, 48, 1, 18, 16, 80, 1, 63, 1, 72, 20, 26, 1, 176, 15, 30, 54, 96, 1, 124, 1, 240, 28, 38, 24, 270, 1, 42, 32, 272, 1, 164, 1, 144, 117, 50, 1, 560, 21, 135, 40, 168, 1, 324, 32, 368, 44, 62, 1, 552, 1, 66, 153, 672, 36, 244, 1, 216, 52, 236, 1, 936, 1, 78, 165, 240, 36, 284, 1, 880]