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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.

A071313 a(n) is the smallest number that cannot be obtained from the numbers {1,3,...,2*n-1} using each number at most once and the operators +, -, *, /, where intermediate subexpressions must be integers.

Table of values

n a(n)
1 2
2 5
3 11
4 41
5 92
6 733
7 4337
8 28972
9 195098
10 1797746

List of values

[2, 5, 11, 41, 92, 733, 4337, 28972, 195098, 1797746]

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

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