A214008 Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*4.

5, 375, 564041, 17609835599, 11798463876314995

Offset: 1

Author

R. H. Hardin Jun 30 2012

Keywords

• nonn

Comments

Column 4 of A214011

Examples

			Some solutions for n=3
..2..2..0....0..0..0....0..0..0....0..0..3....3..0..1....0..0..0....2..0..0
..0..6..2....0..2..0....4..1..0....0..0..4....0..5..0....0..8..0....0..4..3
..0..0..7....0..2..9....0..0..4....0..0..5....0..2..0....0..0..2....0..2..6