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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.

A338486 Numbers n whose symmetric representation of sigma(n) consists of 3 regions with maximum width 2.

Table of values

n a(n)
1 15
2 35
3 45
4 70
5 77
6 91
7 110
8 130
9 135
10 143
11 154
12 170
13 182
14 187
15 190
16 209
17 221
18 225
19 238
20 247
21 266
22 286
23 299
24 322
25 323
26 350
27 374
28 391
29 405
30 418
31 437
32 442
33 493
34 494
35 506
36 527
37 550
38 551
39 572
40 589
41 598
42 638
43 646
44 650
45 667
46 682
47 703
48 713
49 748
50 754
51 782
52 806
53 814
54 836
55 850

List of values

[15, 35, 45, 70, 77, 91, 110, 130, 135, 143, 154, 170, 182, 187, 190, 209, 221, 225, 238, 247, 266, 286, 299, 322, 323, 350, 374, 391, 405, 418, 437, 442, 493, 494, 506, 527, 550, 551, 572, 589, 598, 638, 646, 650, 667, 682, 703, 713, 748, 754, 782, 806, 814, 836, 850]

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

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