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A209086
Number of n X n 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically
0
4, 256, 196916, 1971161340, 260988770962672, 455585601029801268422
OFFSET
1,1
COMMENTS
Diagonal of A209092
EXAMPLE
Some solutions for n=4
..0..1..3..0....3..2..2..1....1..3..0..1....1..0..2..1....2..0..1..1
..2..0..3..0....1..2..2..0....0..0..1..1....0..1..1..2....2..0..1..2
..2..0..3..1....1..3..1..3....0..1..1..3....2..1..0..3....1..3..0..0
..1..2..0..2....1..0..3..3....3..0..3..1....1..0..2..0....1..3..2..2
CROSSREFS
Sequence in context: A206961 A206569 A207576 * A207051 A207128 A223579
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2012
STATUS
approved