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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.

A072017 Numbers k such that gcd(k, reverse(k)) = 81 = 3^4, where reverse(x) = A004086(x).

Table of values

n a(n)
1 2899999989
2 2989999899
3 2999889999
4 3799999899
5 3898989999
6 3899799999
7 3899999988
8 3979989999
9 3988899999
10 3989999898
11 3989999979
12 3998999889
13 3999889998
14 3999898989
15 3999899799
16 3999979989
17 3999988899
18 4699998999

List of values

[2899999989, 2989999899, 2999889999, 3799999899, 3898989999, 3899799999, 3899999988, 3979989999, 3988899999, 3989999898, 3989999979, 3998999889, 3999889998, 3999898989, 3999899799, 3999979989, 3999988899, 4699998999]

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

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