A243858 - OEIS

A243858

Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*2^k - 1 and n*2^(k+1) - 1 do not form a pair of primes.

%I #5 Jun 12 2014 13:24:34

%S 807,6147,22719,35667,35781,39939,56169,60327,62001,107937,108369,

%T 124629,127521,164607,172677,180723,181953,200211,201237,228243,

%U 233769,243177,244623,278121,296703,302451,303717,311847,316857,344751,352461,371169,392709,458343

%N Odd numbers n divisible by 3 such that for all k >= 1 the numbers n*2^k - 1 and n*2^(k+1) - 1 do not form a pair of primes.

%Y Cf. A243857.

%K nonn

%O 1,1

%A _Arkadiusz Wesolowski_, Jun 12 2014