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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.

A137006 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 9.

Table of values

n a(n)
1 1
2 5
3 11
4 15
5 16
6 25
7 96
8 125
9 161
10 511
11 515
12 516
13 1119
14 1125
15 1515
16 1619
17 2261
18 5125
19 9619
20 9961
21 12296
22 12511
23 12515
24 16215
25 16296
26 22619
27 22925
28 25525
29 25596
30 51211
31 96211
32 112515
33 125125
34 126211
35 126969
36 129215
37 161125
38 161219
39 226961
40 256169
41 262925
42 511969
43 516296
44 956619
45 959961
46 1119219
47 1121125
48 1126925
49 1252965
50 1261965
51 1262125

List of values

[1, 5, 11, 15, 16, 25, 96, 125, 161, 511, 515, 516, 1119, 1125, 1515, 1619, 2261, 5125, 9619, 9961, 12296, 12511, 12515, 16215, 16296, 22619, 22925, 25525, 25596, 51211, 96211, 112515, 125125, 126211, 126969, 129215, 161125, 161219, 226961, 256169, 262925, 511969, 516296, 956619, 959961, 1119219, 1121125, 1126925, 1252965, 1261965, 1262125]

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

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