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A230618
Number of 6Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero
1
0, 0, 0, 44916, 4899200, 570014364, 62312057642, 6859445695566, 753992937156292, 82884961506928674, 9111820198577944474, 1001675666375464430008, 110115929289424892845128, 12105240130837251432416920
OFFSET
1,4
COMMENTS
Row 6 of A230614
LINKS
EXAMPLE
Some solutions for n=4
..0..1..2..1....0..1..2..0....0..1..2..0....0..1..2..0....0..1..1..2
..2..0..2..0....0..2..1..0....0..1..1..2....0..1..1..2....2..0..0..2
..1..2..1..0....2..0..2..1....1..2..0..1....1..2..0..1....0..1..2..0
..0..1..2..1....2..0..2..1....1..0..2..1....1..0..2..2....0..1..1..0
..1..2..0..1....1..2..0..2....1..2..0..0....0..1..0..0....0..2..1..1
..1..0..2..1....1..0..1..0....1..2..1..0....1..2..1..0....2..0..2..1
CROSSREFS
Sequence in context: A197614 A202987 A183590 * A185574 A209783 A295467
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 25 2013
STATUS
approved