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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.

A086666 a(n) = sigma_2(n) - sigma_1(n).

Table of values

n a(n)
1 0
2 2
3 6
4 14
5 20
6 38
7 42
8 70
9 78
10 112
11 110
12 182
13 156
14 226
15 236
16 310
17 272
18 416
19 342
20 504
21 468
22 574
23 506
24 790
25 620
26 808
27 780
28 994
29 812
30 1228
31 930
32 1302
33 1172
34 1396
35 1252
36 1820
37 1332
38 1750
39 1644
40 2120
41 1640
42 2404
43 1806
44 2478
45 2288
46 2578
47 2162
48 3286
49 2394
50 3162

List of values

[0, 2, 6, 14, 20, 38, 42, 70, 78, 112, 110, 182, 156, 226, 236, 310, 272, 416, 342, 504, 468, 574, 506, 790, 620, 808, 780, 994, 812, 1228, 930, 1302, 1172, 1396, 1252, 1820, 1332, 1750, 1644, 2120, 1640, 2404, 1806, 2478, 2288, 2578, 2162, 3286, 2394, 3162]

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

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