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Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
0

%I #3 Feb 28 2013 09:21:13

%S 5,5,11,58,142,2398,6463,146947,401552,9871237,27759999,675112590,

%T 1962193874,46428879519,139050595341,3201678397354,9862902257940,

%U 221229238222335,700012077054917

%N Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Row 3 of A222679

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2013