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.

A136930 Numbers k such that k and k^2 use only the digits 0, 3, 4, 6 and 7.

Table of values

n a(n)
1 0
2 6
3 60
4 600
5 6000
6 60000
7 66076
8 600000
9 660760
10 6000000
11 6607600
12 60000000
13 60003706
14 60036706
15 66036076
16 66066376
17 66076000
18 600000000
19 600037060
20 600306344
21 600367060
22 600373006
23 606336074
24 660360760
25 660663760
26 660760000
27 660760474
28 6000000000
29 6000036706
30 6000370600
31 6000637006
32 6003063440
33 6003670600
34 6003730060

List of values

[0, 6, 60, 600, 6000, 60000, 66076, 600000, 660760, 6000000, 6607600, 60000000, 60003706, 60036706, 66036076, 66066376, 66076000, 600000000, 600037060, 600306344, 600367060, 600373006, 606336074, 660360760, 660663760, 660760000, 660760474, 6000000000, 6000036706, 6000370600, 6000637006, 6003063440, 6003670600, 6003730060]

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

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