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.

A136815 Numbers k such that k and k^2 use only the digits 0, 1, 2, 3 and 9.

Table of values

n a(n)
1 0
2 1
3 3
4 10
5 11
6 30
7 100
8 101
9 110
10 111
11 139
12 300
13 1000
14 1001
15 1010
16 1011
17 1100
18 1101
19 1110
20 1390
21 3000
22 10000
23 10001
24 10010
25 10011
26 10100
27 10101
28 10110
29 10111
30 10923
31 11000
32 11001
33 11010
34 11100
35 11101
36 13900
37 30000
38 30203
39 100000
40 100001
41 100010
42 100011
43 100100
44 100101
45 100110
46 100111
47 101000
48 101001
49 101010
50 101011
51 101100
52 101110
53 109139

List of values

[0, 1, 3, 10, 11, 30, 100, 101, 110, 111, 139, 300, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1390, 3000, 10000, 10001, 10010, 10011, 10100, 10101, 10110, 10111, 10923, 11000, 11001, 11010, 11100, 11101, 13900, 30000, 30203, 100000, 100001, 100010, 100011, 100100, 100101, 100110, 100111, 101000, 101001, 101010, 101011, 101100, 101110, 109139]

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

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