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 A230463 Number of n 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 upper left element zero 0
 0, 0, 114, 76518, 281740616, 8449174734112, 1929668277796729476, 3350063281301654212261806 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Diagonal of A230469 LINKS EXAMPLE Some solutions for n=3 ..0..1..0....0..0..2....0..0..2....0..1..0....0..1..1....0..0..2....0..1..0 ..0..0..2....1..1..2....0..1..1....2..0..0....2..2..0....1..1..0....0..0..2 ..1..2..1....0..2..0....0..2..0....1..2..2....1..0..2....0..2..1....2..2..1 CROSSREFS Sequence in context: A178409 A239654 A200577 * A200807 A084877 A060309 Adjacent sequences:  A230460 A230461 A230462 * A230464 A230465 A230466 KEYWORD nonn AUTHOR R. H. Hardin, Oct 20 2013 STATUS approved

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