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A207983
Number of n X n 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically
0
3, 81, 12468, 12271227, 81269646503, 3578849222737632, 1043523305166893694120, 2015556742069061275212434339
OFFSET
1,1
COMMENTS
Diagonal of A207989
EXAMPLE
Some solutions for n=4
..1..1..1..0....0..2..0..0....2..1..2..2....0..2..0..2....0..2..0..1
..1..2..2..2....0..1..2..0....2..2..1..2....2..2..0..2....2..0..1..1
..0..1..2..2....1..0..2..0....0..2..0..2....2..0..1..2....0..2..1..1
..2..0..0..1....0..2..1..2....0..0..2..1....0..2..1..0....2..0..0..1
CROSSREFS
Sequence in context: A206951 A206726 A207352 * A207195 A207215 A355071
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 22 2012
STATUS
approved