A202713 Number of n X n 0..3 arrays with row sums equal and no column sum equal to the previous.

4, 28, 4740, 7788648, 189412482924

Offset: 1

Author

R. H. Hardin Dec 23 2011

Keywords

• nonn

Comments

Column 3 of A202714

Examples

			Some solutions for n=3
..0..2..3....0..3..3....0..3..2....2..3..2....1..2..3....2..1..1....0..1..3
..2..0..3....2..2..2....2..1..2....3..1..3....2..2..2....3..0..1....0..3..1
..2..0..3....3..2..1....0..3..2....3..1..3....0..3..3....2..0..2....1..1..2