Number of inequivalent strings of n digits, when 2 strings are equivalent if turning 1 upside down gives the other.

A036258

Number of inequivalent strings of n digits, when 2 strings are equivalent if turning 1 upside down gives the other.

Terms

    a(0) =1a(1) =9a(2) =90a(3) =945a(4) =9700a(5) =98475a(6) =992250a(7) =9961125a(8) =99805000a(9) =999024375a(10) =9995118750a(11) =99975590625a(12) =999877937500

External references