A181267 - OEIS

A181267

Number of nX(n+1) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order

%I #2 Mar 31 2012 12:35:49

%S 4,11,87,1793,108161,17946611,9014442178

%N Number of nX(n+1) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order

%C Superdiagonal 1 of A181266

%e M and M*Mtranspose (mod 2) for 3X4

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 10 2010