login
Number of 5Xn 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero
0

%I #3 Oct 27 2013 18:02:28

%S 0,0,0,32,15624,2756394,296568384,24842737670,1968730639226,

%T 156736534647626

%N Number of 5Xn 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero

%C Row 5 of A230686

%e Some solutions for n=4

%e ..0..1..0..6....0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..1

%e ..2..3..5..4....0..6..4..5....0..6..4..5....0..5..4..3....0..3..4..5

%e ..4..5..3..2....5..4..6..0....5..4..6..0....6..0..2..1....2..1..6..0

%e ..6..0..1..0....3..2..1..0....3..2..1..0....1..2..0..6....0..6..1..2

%e ..6..5..6..5....1..0..6..5....4..5..6..5....3..4..5..4....5..4..3..2

%K nonn

%O 1,4

%A _R. H. Hardin_, Oct 27 2013