Number of inequivalent expressions involving n operands, ignoring sign.

A247982

Number of inequivalent expressions involving n operands, ignoring sign.

Terms

    a(0) =1a(1) =5a(2) =47a(3) =733a(4) =15907a(5) =443825a(6) =15129599a(7) =609432421a(8) =28322451979

External references