A223812 Number of nX3 0..2 arrays with row sums nondecreasing and column sums unimodal.

22, 337, 4120, 43941, 426527, 3875213, 33540705, 279734339, 2266708593, 17952142360, 139568672552, 1068728748298, 8081450512876, 60468894195838, 448444819136394, 3300666311519663, 24136833802226245, 175525144342241365

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Column 3 of A223815

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..64