A202747 Number of 6Xn 0..1 arrays with row sums equal and column sums unequal to adjacent columns.

2, 44, 1074, 29680, 827502, 27842760, 967878370, 35772388788, 1349807335782, 52493731492612

Offset: 1

Author

R. H. Hardin Dec 23 2011

Keywords

• nonn

Comments

Row 6 of A202742

Examples

			Some solutions for n=4
..1..0..1..0....1..1..0..0....0..1..1..0....1..1..0..0....0..1..0..1
..1..0..1..0....1..0..0..1....1..1..0..0....0..1..0..1....0..0..1..1
..0..1..1..0....1..0..1..0....1..1..0..0....1..0..1..0....0..1..1..0
..1..0..1..0....1..0..1..0....0..1..0..1....0..1..1..0....1..1..0..0
..1..1..0..0....0..0..1..1....1..0..0..1....0..1..0..1....1..0..0..1
..1..0..1..0....0..1..1..0....0..0..1..1....1..0..1..0....0..1..0..1