A213961 Number of n X n 0..7 matrices with row and column i=1..n having sum <= i*7.

8, 1632, 10301232, 1876235252048, 9770128253650761936, 1444750727564469383124521648

Offset: 1

Author

R. H. Hardin Jun 28 2012

Keywords

• nonn

Comments

Column 7 of A213962

Examples

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