%I A031156
%S A031156 1,16,128,8192,16384,262144,16777216,134217728,2147483648,
%T A031156 17179869184,137438953472,562949953421312,2251799813685248,
%U A031156 147573952589676412928,4722366482869645213696
%N A031156 2^A031142(n).
%Y A031156 Sequence in context: A132136 A067488 A120785 this_sequence A099195 A041486 
               A055914
%Y A031156 Adjacent sequences: A031153 A031154 A031155 this_sequence A031157 A031158 
               A031159
%K A031156 nonn
%O A031156 1,2
%A A031156 N. J. A. Sloane (njas(AT)research.att.com).