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A208878
Number of 7Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors
1
715, 5826959, 40380275500, 271499374919883, 1820216057105650386, 12201956787655438957014, 81798476241280856702695038, 548357000894509223687629476021, 3676054154412185019451007694406065
OFFSET
1,1
COMMENTS
Row 7 of A208872
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..1..0..0....0..0..0..1....0..0..0..1....0..0..0..0
..1..2..1..1....1..0..1..2....1..1..0..0....1..1..2..1....1..1..1..1
..1..0..2..1....1..2..0..0....0..1..2..1....2..1..0..3....0..2..3..3
..3..3..1..2....3..1..3..0....3..1..3..0....2..3..0..0....3..2..0..0
..0..2..3..1....1..0..1..3....0..1..0..2....0..2..1..3....3..0..2..0
..2..0..0..1....2..3..1..3....0..1..0..2....2..0..1..0....2..3..3..0
..0..2..2..0....2..2..1..1....0..1..1..1....2..0..1..2....0..0..3..2
CROSSREFS
Sequence in context: A223061 A208863 A208871 * A208174 A200800 A208200
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 02 2012
STATUS
approved