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A203032
Number of 2Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns
1
4, 28, 396, 4904, 57100, 690204, 8590508, 107540900, 1351412312, 17089354228, 217260030296, 2772566648936, 35493572774080, 455659755476112, 5864044526023588, 75626604339946212, 977151287857792884
OFFSET
1,1
COMMENTS
Row 2 of A203031
LINKS
EXAMPLE
Some.solutions.for.n=5
..3..1..0..2..0....1..1..0..3..2....2..3..0..0..3....2..3..1..3..3
..0..3..3..0..0....3..1..0..3..0....0..3..2..1..2....1..3..3..2..3
CROSSREFS
Sequence in context: A155105 A132685 A180966 * A086812 A197872 A203220
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 27 2011
STATUS
approved