A203032 Number of 2Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns

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

R. H. Hardin, Table of n, a(n) for n = 1..28

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

Adjacent sequences: A203029 A203030 A203031 * A203033 A203034 A203035

Keyword

nonn

Author

R. H. Hardin Dec 27 2011

Status

approved