A224194 Number of 7Xn 0..2 arrays with rows unimodal and columns nondecreasing.

36, 1296, 28176, 424326, 4844576, 44435746, 340780382, 2249643632, 13068669308, 67970305364, 320903298144, 1390873688506, 5586138847981, 20953028554541, 73888808853350, 246365532350644, 780525967950004, 2359724042194860

Offset: 1

Author

R. H. Hardin Apr 01 2013

Keywords

• nonn

Comments

Row 7 of A224190

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 28

Formula

Empirical polynomial of degree 28 (see link above)