A223924 Number of 7Xn 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

36, 1296, 26494, 359344, 3588729, 28247478, 183720802, 1022160764, 4994941017, 21887522070, 87447220301, 322906269126, 1114442061385, 3628609366226, 11233293675288, 33279853366178, 94865889314403, 261354658486111

Offset: 1

Author

R. H. Hardin Mar 29 2013

Keywords

• nonn

Comments

Row 7 of A223918

Examples

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

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)