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A181015 Number of nX(n+4) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0 0

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

%S 0,0,0,0,0,0,85,14885,4279160,2134653096,2320636820510,

%T 6138217538155860

%N Number of nX(n+4) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0

%C Superdiagonal 4 of A181011

%e Some solutions for 7X11

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

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

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

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

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

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

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

%K nonn

%O 1,7

%A _R. H. Hardin_ Sep 30 2010

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)