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.

A083823 a(1) = 15; then numbers obtained at every stage of division by 3 in the following process: multiply by 3, reverse the digits, divide by 3, reverse the digits, multiply by 3, reverse the digit, divide by 3.

Table of values

n a(n)
1 15
2 18
3 114
4 1107
5 11004
6 110007
7 1100004
8 11000007
9 110000004
10 1100000007
11 11000000004
12 110000000007
13 1100000000004
14 11000000000007
15 110000000000004
16 1100000000000007
17 11000000000000004
18 110000000000000007
19 1100000000000000004
20 11000000000000000007

List of values

[15, 18, 114, 1107, 11004, 110007, 1100004, 11000007, 110000004, 1100000007, 11000000004, 110000000007, 1100000000004, 11000000000007, 110000000000004, 1100000000000007, 11000000000000004, 110000000000000007, 1100000000000000004, 11000000000000000007]

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

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