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.

A180098 Sigma(A180097(n)), sum of divisors of A180097(n), numbers n such that sigma(n) is powerful.

Table of values

n a(n)
1 1
2 4
3 8
4 32
5 36
6 72
7 32
8 72
9 72
10 72
11 144
12 144
13 72
14 121
15 108
16 128
17 144
18 216
19 108
20 216
21 144
22 144
23 128
24 288
25 216
26 288
27 392
28 216
29 288
30 324
31 216
32 200
33 576
34 288
35 324
36 256
37 432
38 288
39 432
40 288
41 432
42 324
43 576
44 392
45 576
46 648
47 432
48 576
49 864
50 400
51 576
52 432
53 576
54 784
55 432

List of values

[1, 4, 8, 32, 36, 72, 32, 72, 72, 72, 144, 144, 72, 121, 108, 128, 144, 216, 108, 216, 144, 144, 128, 288, 216, 288, 392, 216, 288, 324, 216, 200, 576, 288, 324, 256, 432, 288, 432, 288, 432, 324, 576, 392, 576, 648, 432, 576, 864, 400, 576, 432, 576, 784, 432]