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 A207222 Number of n X n 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal 0
 3, 81, 6819, 3447649, 8779228417, 105855104360481, 6152504033864688529, 1755834487701036618450529 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A207228 LINKS EXAMPLE Some solutions for n=4 ..2..0..1..2....0..1..2..2....2..0..0..1....0..2..0..0....2..1..0..2 ..0..2..2..0....2..2..0..0....1..1..0..2....0..1..2..0....1..2..2..1 ..2..2..0..1....0..2..2..0....0..2..1..0....1..0..2..0....1..0..2..0 ..2..1..0..2....0..1..1..1....2..2..2..0....1..2..2..2....0..0..2..0 CROSSREFS Sequence in context: A207229 A223717 A223825 * A207007 A223783 A223969 Adjacent sequences: A207219 A207220 A207221 * A207223 A207224 A207225 KEYWORD nonn AUTHOR R. H. Hardin Feb 16 2012 STATUS approved

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Last modified March 30 05:15 EDT 2023. Contains 361606 sequences. (Running on oeis4.)