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A230472 Number of 4Xn 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 upper left element zero 1
0, 8, 1384, 76518, 3062214, 131421154, 5660619846, 245148922672, 10602405238156, 458539032665354, 19829852540702200, 857572844510153520, 37087106370781509158, 1603891953715654451316, 69362889010577734405252 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 4 of A230469
LINKS
FORMULA
Empirical recurrence of order 57 (see link above)
EXAMPLE
Some solutions for n=3
..0..1..0....0..1..1....0..2..1....0..1..1....0..1..1....0..2..1....0..2..0
..2..0..2....1..2..2....1..1..2....1..2..2....0..2..2....0..1..1....2..1..1
..1..2..2....0..0..1....0..0..0....1..0..2....0..0..1....2..2..1....2..0..0
..1..1..0....0..1..2....0..1..2....0..1..2....2..1..0....2..0..2....2..2..2
CROSSREFS
Sequence in context: A001418 A123268 A088080 * A160103 A283902 A064073
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 20 2013
STATUS
approved

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Last modified July 21 22:43 EDT 2024. Contains 374478 sequences. (Running on oeis4.)