A224284 Number of 5Xn 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

1024, 160000, 2596992, 21348990, 137489538, 817075668, 4728056658, 26524273813, 141437578159, 706256665798, 3280530467805, 14165878265784, 57028400060821, 214999615263699, 762959963267749, 2561695629991349, 8178284227377456

Offset: 1

Author

R. H. Hardin Apr 02 2013

Keywords

• nonn

Comments

Row 5 of A224281

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 30

Formula

Empirical polynomial of degree 30 (see link above)