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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.

A247687 Numbers m with the property that the symmetric representation of sigma(m) has three parts of width one.

Table of values

n a(n)
1 9
2 25
3 49
4 50
5 98
6 121
7 169
8 242
9 289
10 338
11 361
12 484
13 529
14 578
15 676
16 722
17 841
18 961
19 1058
20 1156
21 1369
22 1444
23 1681
24 1682
25 1849
26 1922
27 2116
28 2209
29 2312
30 2738
31 2809
32 2888
33 3362
34 3364
35 3481
36 3698
37 3721
38 3844
39 4232
40 4418
41 4489
42 5041
43 5329
44 5476
45 5618
46 6241
47 6724
48 6728
49 6889
50 6962
51 7396
52 7442
53 7688
54 7921
55 8836
56 8978
57 9409

List of values

[9, 25, 49, 50, 98, 121, 169, 242, 289, 338, 361, 484, 529, 578, 676, 722, 841, 961, 1058, 1156, 1369, 1444, 1681, 1682, 1849, 1922, 2116, 2209, 2312, 2738, 2809, 2888, 3362, 3364, 3481, 3698, 3721, 3844, 4232, 4418, 4489, 5041, 5329, 5476, 5618, 6241, 6724, 6728, 6889, 6962, 7396, 7442, 7688, 7921, 8836, 8978, 9409]

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

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