%I A031155
%S A031155 1024,1048576,1073741824,1099511627776,70368744177664,
%T A031155 295147905179352825856,9903520314283042199192993792,
%U A031155 39614081257132168796771975168
%N A031155 2^A021140(n).
%Y A031155 Sequence in context: A017441 A017573 A016750 this_sequence A140300 A016798 
               A016834
%Y A031155 Adjacent sequences: A031152 A031153 A031154 this_sequence A031156 A031157 
               A031158
%K A031155 nonn
%O A031155 1,1
%A A031155 N. J. A. Sloane (njas(AT)research.att.com).