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.

A216164 Period of powers of 7 mod 10^n.

Table of values

n a(n)
1 4
2 4
3 20
4 100
5 500
6 5000
7 50000
8 500000
9 5000000
10 50000000
11 500000000
12 5000000000
13 50000000000
14 500000000000
15 5000000000000
16 50000000000000
17 500000000000000
18 5000000000000000
19 50000000000000000
20 500000000000000000

List of values

[4, 4, 20, 100, 500, 5000, 50000, 500000, 5000000, 50000000, 500000000, 5000000000, 50000000000, 500000000000, 5000000000000, 50000000000000, 500000000000000, 5000000000000000, 50000000000000000, 500000000000000000]

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

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