%I A162118
%S A162118 2,4,25,408,18003,2289232,851979730,942937083934,3167530249345690,
%T A162118 33089477020771124591,1100195641116766627675728
%N A162118 Number of nXn binary arrays with rows and columns, considered as graycode 
               numbers, in strictly increasing order
%Y A162118 Sequence in context: A162124 A162125 A162126 this_sequence A128774 A129894 
               A028386
%Y A162118 Adjacent sequences: A162115 A162116 A162117 this_sequence A162119 A162120 
               A162121
%K A162118 nonn
%O A162118 1,1
%A A162118 Ron Hardin (rhhardin(AT)att.net) Jun 25 2009