A223980 Number of 7Xn 0..2 arrays with rows and antidiagonals unimodal.

2187, 4782969, 1380511272, 92756321858, 2708281019793, 47087051658638, 574360426081996, 5392250304954708, 41292036231202766, 268318893714852915, 1522088317195862139, 7698392543196415664, 35283079262827759084

Offset: 1

Author

R. H. Hardin Mar 30 2013

Keywords

• nonn

Comments

Row 7 of A223975

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
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..1....0..0..0....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0
..0..1..0....0..1..1....0..1..0....0..0..1....0..0..0....1..0..0....0..1..0
..0..2..2....2..2..0....1..2..1....1..1..1....2..1..0....0..0..0....2..0..0
..0..2..2....1..1..0....2..2..0....2..1..1....1..1..2....1..2..1....0..0..0
..1..1..0....0..1..2....0..1..2....1..1..2....2..1..1....2..2..1....0..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..113
• R. H. Hardin, Empirical polynomial of degree 28

Formula

Empirical polynomial of degree 28 (see link above)