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.

A136809 Numbers k such that k and k^2 use only the digits 0, 1, 2 and 3.

Table of values

n a(n)
1 0
2 1
3 10
4 11
5 100
6 101
7 110
8 111
9 1000
10 1001
11 1010
12 1011
13 1100
14 1101
15 1110
16 10000
17 10001
18 10010
19 10011
20 10100
21 10101
22 10110
23 10111
24 11000
25 11001
26 11010
27 11100
28 11101
29 100000
30 100001
31 100010
32 100011
33 100100
34 100101
35 100110
36 100111
37 101000
38 101001
39 101010
40 101011
41 101100
42 101110
43 110000
44 110001
45 110010
46 110100
47 110101
48 111000
49 111001
50 111010

List of values

[0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 10000, 10001, 10010, 10011, 10100, 10101, 10110, 10111, 11000, 11001, 11010, 11100, 11101, 100000, 100001, 100010, 100011, 100100, 100101, 100110, 100111, 101000, 101001, 101010, 101011, 101100, 101110, 110000, 110001, 110010, 110100, 110101, 111000, 111001, 111010]

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

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