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 A206969 Number of n X 3 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal. 1
 61, 3721, 180294, 8688551, 417476451, 20061347530, 964232197214, 46342878010975, 2227208361171493, 107037437137291874, 5144073029981454466, 247217125357454922329, 11880914300903502206370, 570980378586885004101078 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A206974. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..1..0..2....0..1..1....2..2..1....1..3..3....0..1..0....2..0..3....2..1..2 ..3..2..1....3..3..0....0..0..3....1..1..3....3..2..2....0..2..0....3..0..1 ..1..0..3....3..1..1....0..0..2....0..1..0....1..2..1....3..1..1....2..0..0 ..3..0..1....3..2..1....2..2..0....0..1..0....1..0..2....2..0..2....1..3..0 CROSSREFS Cf. A206974. Sequence in context: A207224 A207011 A206975 * A206792 A206962 A206572 Adjacent sequences: A206966 A206967 A206968 * A206970 A206971 A206972 KEYWORD nonn AUTHOR R. H. Hardin Feb 14 2012 STATUS approved

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Last modified December 5 20:45 EST 2023. Contains 367594 sequences. (Running on oeis4.)