A223979 Number of 6Xn 0..2 arrays with rows and antidiagonals unimodal.

729, 531441, 70779056, 2809740785, 55803232969, 715985189481, 6766457318128, 50783406166411, 317861952928894, 1716630787916775, 8199247742192030, 35287118527617297, 138825002272586304, 505004840634444527

Offset: 1

Author

R. H. Hardin Mar 30 2013

Keywords

• nonn

Comments

Row 6 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..1....0..0..0....0..0..1....0..0..1....0..0..1....0..0..1....0..0..1
..0..1..1....1..1..1....1..1..0....1..1..0....1..1..0....0..1..0....1..1..1
..0..2..1....0..1..0....0..2..1....0..0..1....1..2..0....0..0..1....0..1..1
..0..1..0....0..2..0....1..1..2....0..1..1....1..2..2....0..1..0....0..1..2
..1..2..1....1..1..2....0..0..1....1..2..1....0..2..0....1..1..1....0..2..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..144
• R. H. Hardin, Empirical polynomial of degree 24

Formula

Empirical polynomial of degree 24 (see link above)