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.

A102128 a(1) = 1; a(n) = sum of previous terms which divide n.

Table of values

n a(n)
1 1
2 1
3 2
4 4
5 2
6 6
7 2
8 12
9 2
10 10
11 2
12 34
13 2
14 14
15 2
16 20
17 2
18 24
19 2
20 54
21 2
22 22
23 2
24 70
25 2
26 26
27 2
28 46
29 2
30 46
31 2
32 36
33 2
34 68
35 2
36 94
37 2
38 38
39 2
40 74
41 2
42 62
43 2
44 70
45 2
46 138
47 2
48 94
49 2
50 60
51 2
52 82
53 2
54 114
55 2
56 74
57 2
58 58
59 2
60 172
61 2
62 124
63 2
64 68
65 2
66 94
67 2
68 242
69 2
70 234
71 2
72 154
73 2
74 222
75 2
76 118
77 2
78 110
79 2
80 114
81 2

List of values

[1, 1, 2, 4, 2, 6, 2, 12, 2, 10, 2, 34, 2, 14, 2, 20, 2, 24, 2, 54, 2, 22, 2, 70, 2, 26, 2, 46, 2, 46, 2, 36, 2, 68, 2, 94, 2, 38, 2, 74, 2, 62, 2, 70, 2, 138, 2, 94, 2, 60, 2, 82, 2, 114, 2, 74, 2, 58, 2, 172, 2, 124, 2, 68, 2, 94, 2, 242, 2, 234, 2, 154, 2, 222, 2, 118, 2, 110, 2, 114, 2]

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

Content is available under The OEIS End-User License Agreement.