A223991 Number of 6Xn 0..3 arrays with rows unimodal and columns nondecreasing.

84, 7056, 325120, 9647292, 204647416, 3322756326, 43307637038, 469239396496, 4340915844892, 35013234463686, 250416999823220, 1610131956940138, 9414450936518133, 50540930874984955, 251164546472066722

Offset: 1

Author

R. H. Hardin Mar 30 2013

Keywords

• nonn

Comments

Row 6 of A223987

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 36

Formula

Empirical polynomial of degree 36 (see link above)