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.

A247047 Numbers k such that k^2 contains exactly 2 distinct digits and k^3 contains exactly 3 distinct digits.

Table of values

n a(n)
1 5
2 6
3 8
4 9
5 15
6 30
7 173
8 300
9 3000
10 30000
11 300000
12 3000000
13 30000000
14 300000000
15 3000000000
16 30000000000
17 300000000000
18 3000000000000
19 30000000000000
20 300000000000000
21 3000000000000000

List of values

[5, 6, 8, 9, 15, 30, 173, 300, 3000, 30000, 300000, 3000000, 30000000, 300000000, 3000000000, 30000000000, 300000000000, 3000000000000, 30000000000000, 300000000000000, 3000000000000000]

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

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