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A181008 Number of (n+4)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1s 0

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

%S 0,0,0,1,214,175257,262890863,971594134303,10088497788330117

%N Number of (n+4)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1s

%C Subdiagonal 4 of A181004

%e All solutions for 8X4

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

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

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

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

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

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

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

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

%K nonn

%O 1,5

%A _R. H. Hardin_ Sep 30 2010

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Last modified April 19 16:21 EDT 2024. Contains 371794 sequences. (Running on oeis4.)