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 A206856 Number of n X n 0..2 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal 0
 3, 81, 11092, 7598355, 31208037240, 729358354663001, 92792498733436652359 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A206863 LINKS EXAMPLE Some solutions for n=4 ..0..2..2..2....2..0..1..2....0..2..2..0....0..2..0..1....2..2..2..1 ..1..1..0..2....0..2..2..0....1..0..0..0....2..0..1..1....2..1..0..2 ..2..0..1..1....2..2..0..1....2..2..1..2....0..2..1..1....2..0..0..2 ..2..2..1..2....2..1..2..2....0..1..2..2....2..0..0..1....1..0..1..2 CROSSREFS Sequence in context: A223783 A223969 A207202 * A206951 A206726 A207352 Adjacent sequences: A206853 A206854 A206855 * A206857 A206858 A206859 KEYWORD nonn AUTHOR R. H. Hardin Feb 13 2012 STATUS approved

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Last modified February 4 07:13 EST 2023. Contains 360046 sequences. (Running on oeis4.)