A222800 - OEIS

%I #3 Mar 05 2013 18:06:35

%S 0,11920,589134,80934417,3723507945,762956665320,39461160617203,

%T 8932502455950350,507262993527434693,126807825110575873512

%N Number of 7Xn 0..3 arrays with exactly floor(7Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Row 7 of A222794

%e Some solutions for n=3

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

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

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

%e ..1..2..1....0..0..0....0..0..0....0..0..1....0..1..2....0..0..0....0..1..2

%e ..1..0..0....0..0..1....1..0..2....2..3..0....2..2..2....0..1..2....0..3..3

%e ..0..0..0....0..1..1....3..0..1....0..0..0....2..2..0....3..1..2....0..3..0

%e ..0..1..1....2..0..0....3..2..3....2..0..1....2..3..2....2..2..3....3..3..3

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 05 2013