A203494 Number of 4Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

3, 82, 3760, 173860, 8518564, 442135180, 24148894412

Offset: 1

Author

R. H. Hardin Jan 02 2012

Keywords

• nonn

Comments

Row 4 of A203491

Examples

			Some solutions for n=5
..2..1..0..0..2....1..2..2..0..0....0..1..2..1..2....1..2..1..1..0
..0..0..2..1..2....1..1..2..0..1....1..2..1..0..2....1..2..0..1..1
..1..1..1..1..1....2..1..2..0..0....1..1..1..2..1....2..0..2..0..1
..0..2..2..0..1....0..2..2..0..1....1..2..1..1..1....2..0..2..1..0