%I A005844 M2707
%S A005844 3,7,127,170141183460469231731687303715884105727
%N A005844 a(n+1) = 2^a(n) - 1.
%D A005844 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005844 P. Ribenboim, The Book of Prime Number Records. Springer-Verlag, NY, 
               2nd ed., 1989, p. 81.
%Y A005844 Subsequence of A007013.
%Y A005844 Sequence in context: A125956 A128071 A079622 this_sequence A156521 A012636 
               A006031
%Y A005844 Adjacent sequences: A005841 A005842 A005843 this_sequence A005845 A005846 
               A005847
%K A005844 dead
%O A005844 0,1