A214013 Number of 4X4 nonnegative integer matrices with row and column i=1..4 having sum <= i*n.

24950, 9318805, 641631566, 17609835599, 269462676001, 2747459653062, 20767436139206, 124705556762920, 623826151413581, 2689745345189961, 10252109460663720, 35217218076189536, 110684300106966444

Offset: 1

Author

R. H. Hardin Jun 30 2012

Keywords

• nonn

Comments

Row 4 of A214011

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..16