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Number of nX(n+2) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order
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%I #2 Mar 31 2012 12:35:50

%S 8,48,766,28924,3409059,1126220822

%N Number of nX(n+2) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order

%C Superdiagonal 2 of A181274

%e M and M*Mtranspose (mod 2) for 3X5

%e ..0..0..0..1..0......1..1..1

%e ..0..1..0..1..1......1..1..0

%e ..1..1..0..1..0......1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 10 2010