A223813 Number of nX4 0..2 arrays with row sums nondecreasing and column sums unimodal.

46, 1922, 65465, 1941904, 52310070, 1313561156, 31302500115, 716436867795, 15887478421991, 343524128791643, 7277651757377395, 151618311154271042, 3115328781386015762, 63276105450145436904, 1272818850579941619368

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Column 4 of A223815

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..19