cp's OEIS Frontend

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.

A136817 Numbers k such that k and k^2 use only the digits 0, 1, 2, 4 and 5.

Table of values

n a(n)
1 0
2 1
3 2
4 5
5 10
6 11
7 12
8 15
9 20
10 21
11 45
12 50
13 100
14 101
15 102
16 105
17 110
18 112
19 120
20 145
21 150
22 155
23 200
24 201
25 205
26 210
27 211
28 450
29 500
30 501
31 502
32 505
33 1000
34 1001
35 1002
36 1005
37 1010
38 1011
39 1012
40 1020
41 1021
42 1050
43 1100
44 1101
45 1102
46 1105
47 1120
48 1200
49 1201
50 1205
51 1245
52 1415
53 1450
54 1451
55 1500
56 1550
57 2000
58 2001
59 2005
60 2010
61 2011
62 2050
63 2100
64 2101
65 2110
66 2245
67 4500
68 5000
69 5001

List of values

[0, 1, 2, 5, 10, 11, 12, 15, 20, 21, 45, 50, 100, 101, 102, 105, 110, 112, 120, 145, 150, 155, 200, 201, 205, 210, 211, 450, 500, 501, 502, 505, 1000, 1001, 1002, 1005, 1010, 1011, 1012, 1020, 1021, 1050, 1100, 1101, 1102, 1105, 1120, 1200, 1201, 1205, 1245, 1415, 1450, 1451, 1500, 1550, 2000, 2001, 2005, 2010, 2011, 2050, 2100, 2101, 2110, 2245, 4500, 5000, 5001]