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A207195
Number of n X n 0..2 arrays avoiding the pattern z-1 z-1 z in any row or column.
0
3, 81, 12534, 12539372, 82169395789, 3560964505762489, 1025697542018363494742, 1959801984026721315634303343
OFFSET
1,1
COMMENTS
Diagonal of A207201.
EXAMPLE
Some solutions for n=4
..0..2..2..2....0..2..0..2....1..0..2..0....0..2..2..0....2..2..2..1
..1..1..0..2....2..2..0..2....1..0..0..0....1..0..0..0....2..1..0..2
..2..0..1..0....2..0..2..2....0..2..0..0....2..2..1..2....2..0..0..2
..1..2..0..2....0..2..1..0....2..0..0..0....0..0..2..0....1..0..2..2
CROSSREFS
Cf. A207201.
Sequence in context: A206726 A207352 A207983 * A207215 A355071 A207544
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 15 2012
STATUS
approved