A023975 - OEIS

A023975

First bit in fractional part of binary expansion of 8th root of n.

%I #12 Jul 22 2020 12:17:18

%S 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,

%T 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

%U 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1

%N First bit in fractional part of binary expansion of 8th root of n.

%t Array[ Function[ n, RealDigits[ N[ Power[ n, 1/8 ], 10 ], 2 ]// (#[ [ 1, #[ [ 2 ] ]+1 ] ])& ], 110 ]

%t Table[RealDigits[Surd[n,8],2,50][[1,2]],{n,110}] (* _Harvey P. Dale_, Jul 22 2020 *)

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, _Olivier Gérard_