A206969 - OEIS

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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.

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