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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.

A288759 Number of distinct rational numbers that can be obtained in n steps by applying addition, subtraction, multiplication and division to any two potentially identical numbers from the complete set of numbers created in n-1 steps, starting with the set {1}.

Table of values

n a(n)
0 1
1 3
2 8
3 38
4 555
5 74423
6 902663448

List of values

[1, 3, 8, 38, 555, 74423, 902663448]

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

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