A223891 Number of nX4 0..2 arrays with row sums and column sums unimodal.

46, 3298, 187103, 8878492, 367772497, 13710418065, 469842794992, 15032271992980, 454296896353698, 13086457136814204, 361878926424024255, 9661547783502821964, 250204578633128649051, 6309270603849297385833

Offset: 1

Author

R. H. Hardin Mar 28 2013

Keywords

• nonn

Comments

Column 4 of A223892

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..15