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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.

A165086 Consider the base-7 Kaprekar map x->K(x) described in A165071. Sequence gives the smallest number that belongs to a cycle of length n under repeated iteration of this map, or -1 if there is no cycle of length n.

Table of values

n a(n)
1 0
2 144
3 1068
4 9458722410775248
5 9936
6 55500
7 65945195409025452

List of values

[0, 144, 1068, 9458722410775248, 9936, 55500, 65945195409025452]

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

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