%I A157333
%S A157333 2,1,2,1,4,3,12,31,2,14,19,15,17,467,37,111,1382,4830,276,1962,360,1749,
%T A157333 2857,17253,9414,11974,30167,18822,21387,24721
%N A157333 Least j such that 6*p(j)*M(n)-1 is prime with p(j)=j-th prime and M(n) 
               = Mersenne prime
%e A157333 6*3*(2^2-1)-1=53 prime 2^2-1=M(1) 3=p(2) so j(1)=2 6*2*(2^3-1)-1=83 prime 
               2^3-1=M(2) 2=p(1) so j(2)=1
%Y A157333 Sequence in context: A105778 A088931 A088980 this_sequence A002852 A099875 
               A079499
%Y A157333 Adjacent sequences: A157330 A157331 A157332 this_sequence A157334 A157335 
               A157336
%K A157333 nonn
%O A157333 1,1
%A A157333 Pierre CAMI (pierre-cami(AT)orange.fr), Feb 27 2009