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.

A061765 a(n) = usigma(sigma(n)), where usigma(n) is the sum of unitary divisors of n (A034448) and sigma(n) is the sum of the divisors (A000203).

Table of values

n a(n)
1 1
2 4
3 5
4 8
5 12
6 20
7 9
8 24
9 14
10 30
11 20
12 40
13 24
14 36
15 36
16 32
17 30
18 56
19 30
20 96
21 33
22 50
23 36
24 120
25 32
26 96
27 54
28 72
29 72
30 90
31 33
32 80
33 68
34 84
35 68
36 112
37 60
38 120
39 72
40 180
41 96
42 132
43 60
44 160
45 168
46 90
47 68
48 160
49 80
50 128
51 90
52 150
53 84
54 216
55 90
56 216
57 102
58 180
59 120
60 288

List of values

[1, 4, 5, 8, 12, 20, 9, 24, 14, 30, 20, 40, 24, 36, 36, 32, 30, 56, 30, 96, 33, 50, 36, 120, 32, 96, 54, 72, 72, 90, 33, 80, 68, 84, 68, 112, 60, 120, 72, 180, 96, 132, 60, 160, 168, 90, 68, 160, 80, 128, 90, 150, 84, 216, 90, 216, 102, 180, 120, 288]

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

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