%I #4 Dec 18 2015 18:17:23
%S 2,4,25,408,18003,2289232,851979730,942937083934,3167530249345690,
%T 33089477020771124591,1100195641116766627675728
%N Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order
%K nonn
%O 1,1
%A _R. H. Hardin_ Jun 25 2009
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