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A231042
Number of 6 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
0
0, 12, 2988, 375620, 36327118, 10140483166, 1844073908022, 383056487876288, 74556370297711856, 14997676327239628696
OFFSET
1,2
COMMENTS
Row 6 of A231037.
EXAMPLE
Some solutions for n=3
..0..2..0....0..1..0....0..2..0....0..2..0....0..2..0....0..2..0....0..1..0
..1..1..0....2..2..1....2..1..1....2..1..1....2..1..1....2..1..1....2..2..1
..2..0..2....1..0..0....1..0..1....2..0..2....2..0..2....0..0..0....1..0..0
..2..1..1....1..1..0....0..2..2....0..1..2....2..1..2....1..2..0....1..1..1
..2..2..0....2..2..1....1..1..1....0..2..2....1..0..0....2..1..1....2..2..0
..1..0..1....1..0..1....2..0..2....1..0..1....1..2..1....2..0..2....1..0..1
CROSSREFS
Cf. A231037.
Sequence in context: A028666 A103658 A271515 * A370300 A283831 A268008
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 03 2013
STATUS
approved