A186894 - OEIS

A186894

Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

%I #5 Mar 31 2012 12:36:06

%S 0,148,444,5401,39372,703983,14050512,523902288,17552393136,

%T 1009883277293,82740925046288,10723440611064915

%N Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

%C Diagonal of A186902

%e Some solutions for 3X3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 28 2011