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Number of (n+2)X6 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order
1

%I #5 Mar 31 2012 12:37:00

%S 622031,5883499,39646479,316144367,2336174650,18005605178,

%T 133138952807,1021696725403,7600400348007,57596403355943,

%U 431103751656442,3265443131997842,24492821001141386,185016562122791635

%N Number of (n+2)X6 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

%C Column 4 of A204056

%H R. H. Hardin, <a href="/A204052/b204052.txt">Table of n, a(n) for n = 1..84</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 09 2012