A223817 Number of 3Xn 0..2 arrays with row sums nondecreasing and column sums unimodal.

10, 222, 4120, 65465, 921010, 11789302, 139965348, 1562685952, 16583874090, 168662333466, 1654400665258, 15732261029037, 145639935220714, 1317015705919726, 11667008847929888, 101490035584201884

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Row 3 of A223815

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..48