A223661 Number of nX3 0..3 arrays with row sums unimodal and column sums inverted unimodal.

50, 3060, 141046, 5285887, 169756788, 4836834467, 125226945708, 2997363216275, 67192414310968, 1424909830742272, 28811928773038893, 559031955620162864, 10462533894185251783, 189688734342719058204, 3343610975591843927435

Offset: 1

Author

R. H. Hardin Mar 25 2013

Keywords

• nonn

Comments

Column 3 of A223663

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..24