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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.

A174468 a(n) = Sum_{d|n} d*sigma(n/d)*sigma(d).

Table of values

n a(n)
1 1
2 9
3 16
4 53
5 36
6 144
7 64
8 261
9 178
10 324
11 144
12 848
13 196
14 576
15 576
16 1173
17 324
18 1602
19 400
20 1908
21 1024
22 1296
23 576
24 4176
25 986
26 1764
27 1744
28 3392
29 900
30 5184
31 1024
32 5013
33 2304
34 2916
35 2304
36 9434
37 1444
38 3600
39 3136
40 9396
41 1764
42 9216
43 1936
44 7632
45 6408
46 5184
47 2304

List of values

[1, 9, 16, 53, 36, 144, 64, 261, 178, 324, 144, 848, 196, 576, 576, 1173, 324, 1602, 400, 1908, 1024, 1296, 576, 4176, 986, 1764, 1744, 3392, 900, 5184, 1024, 5013, 2304, 2916, 2304, 9434, 1444, 3600, 3136, 9396, 1764, 9216, 1936, 7632, 6408, 5184, 2304]

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

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