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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.

A273525 Start with the set {0, 1}. At each step replace the set with the set of means of all its nonempty subsets. a(n) is the size of the set after the n-th step.

Table of values

n a(n)
0 2
1 3
2 5
3 15
4 875
5 603919253973

List of values

[2, 3, 5, 15, 875, 603919253973]

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

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