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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.

A232067 Numbers k such that sigma(k^2) and Sum_{d|k} d*sigma(d) are both multiples of k.

Table of values

n a(n)
1 1
2 39
3 793
4 2379
5 7137
6 76921
7 230763
8 692289
9 2076867
10 8329831
11 24989493
12 53695813
13 74968479
14 161087439
15 224905437
16 243762649
17 324863409
18 375870691
19 483262317
20 731287947
21 1127612073
22 1449786951
23 2094136707
24 2193863841
25 2631094837
26 3382836219
27 3606816823

List of values

[1, 39, 793, 2379, 7137, 76921, 230763, 692289, 2076867, 8329831, 24989493, 53695813, 74968479, 161087439, 224905437, 243762649, 324863409, 375870691, 483262317, 731287947, 1127612073, 1449786951, 2094136707, 2193863841, 2631094837, 3382836219, 3606816823]

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

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