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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.

A137005 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 8.

Table of values

n a(n)
1 1
2 5
3 11
4 15
5 16
6 25
7 81
8 125
9 261
10 285
11 511
12 515
13 516
14 816
15 1125
16 1285
17 1585
18 2261
19 2285
20 2581
21 2585
22 5125
23 11211
24 12511
25 12515
26 12581
27 25525
28 25615
29 26125
30 28615
31 28665
32 51211
33 81125
34 81585
35 112166
36 125125
37 158816
38 256615
39 258125
40 261125
41 261881
42 285515
43 515615
44 811516
45 828665
46 1118865
47 1585125
48 1681125
49 2261125
50 2285216
51 5162515
52 5185125

List of values

[1, 5, 11, 15, 16, 25, 81, 125, 261, 285, 511, 515, 516, 816, 1125, 1285, 1585, 2261, 2285, 2581, 2585, 5125, 11211, 12511, 12515, 12581, 25525, 25615, 26125, 28615, 28665, 51211, 81125, 81585, 112166, 125125, 158816, 256615, 258125, 261125, 261881, 285515, 515615, 811516, 828665, 1118865, 1585125, 1681125, 2261125, 2285216, 5162515, 5185125]

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

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