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Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6
1

%I #5 Dec 16 2014 18:42:30

%S 12726,94578,723110,5618854,44203794,348767254,2755444362,21800265534,

%T 172528906186,1365581241910,10810960670358,85592351487406,

%U 677662650566558,5365440165670510,42481665945179918,336356291724557310

%N Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 or 6

%C Column 1 of A252325

%H R. H. Hardin, <a href="/A252322/b252322.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 16 2014