A204981 - OEIS

A204981

Least 2^(k-1) such that n divides 2^(k-1)-2^(j-1) for some j<k.

%I #5 Mar 30 2012 18:58:08

%S 2,4,4,8,16,8,8,16,64,32,1024,16,4096,16,16,32,256,128,262144,64,64,

%T 2048,2048,32,1048576,8192,262144,32,268435456,32,32,64,1024,512,4096,

%U 256,68719476736,524288,4096,128,1048576,128,16384,4096,4096

%N Least 2^(k-1) such that n divides 2^(k-1)-2^(j-1) for some j<k.

%C For a guide to related sequences, see A204892.

%t (See the program at A204979.)

%Y Cf. A204932, A204979.

%K nonn

%O 1,1

%A _Clark Kimberling_, Jan 21 2012