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A207213
Number of 7Xn 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal
0
1440, 2073600, 1009600274, 500670359576, 261868042220093, 137715069370357544, 72904426459924759331
OFFSET
1,1
COMMENTS
Row 7 of A207208
EXAMPLE
Some solutions for n=4
..0..1..1..0....1..1..0..1....2..2..1..0....0..2..2..1....1..0..0..2
..0..1..2..1....1..1..0..1....0..1..2..1....1..2..2..1....1..1..1..0
..0..0..0..0....0..0..0..0....0..1..0..0....2..0..1..1....0..1..0..0
..0..2..2..0....2..1..0..0....2..0..0..0....2..1..1..0....0..0..0..2
..0..1..0..2....1..2..2..0....0..2..0..2....1..0..0..2....2..2..2..0
..2..2..2..2....2..1..2..2....1..2..2..2....1..2..0..2....0..0..2..1
..1..2..2..2....2..0..0..2....0..2..2..0....0..2..2..2....2..1..2..0
CROSSREFS
Sequence in context: A023102 A289633 A282330 * A207207 A206733 A207357
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 15 2012
STATUS
approved