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Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero
1

%I #4 Oct 22 2013 05:50:57

%S 0,246726,279167078,415065958262,634283945584134,959021374133908722,

%T 1451215874840625764698,2196329862973840181547028,

%U 3323882830971748223236810484,5030309718995416794788281780166

%N Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

%C Column 7 of A230526

%H R. H. Hardin, <a href="/A230525/b230525.txt">Table of n, a(n) for n = 1..47</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 22 2013