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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.

A071314 a(n) is the smallest number that cannot be obtained from the numbers {2^0,2^1,...,2^n} using each number at most once and the operators +, -, *, /. Parentheses are allowed, intermediate fractions are not allowed.

Table of values

n a(n)
0 2
1 4
2 11
3 27
4 77
5 595
6 2471
7 9643
8 51787

List of values

[2, 4, 11, 27, 77, 595, 2471, 9643, 51787]

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

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