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%I #3 Dec 18 2015 18:17:26
%S 2,3,7,67,1282,81476,15970248
%N Number of n X n binary matrices M with rows in strictly increasing order such that M^2 (mod 2) has rows in strictly decreasing order
%e M and M^2 (mod 2) for 3X3
%e ..0..1..0......1..1..0
%e ..1..1..0......1..0..0
%e ..1..1..1......0..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Oct 10 2010