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.

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.