Smallest positive integer that cannot be obtained from an expression consisting of digits 0,1,...,n-1, each used exactly once, and any mix of the four arithmetic operations +-*/ plus balanced parentheses. Digits may be concatenated as in 210+34. Neither unary minus signs nor exponents are allowed.

A363303

Smallest positive integer that cannot be obtained from an expression consisting of digits 0,1,...,n-1, each used exactly once, and any mix of the four arithmetic operations +-*/ plus balanced parentheses. Digits may be concatenated as in 210+34. Neither unary minus signs nor exponents are allowed.