A223890 Number of n X 3 0..2 arrays with row sums and column sums unimodal.

22, 564, 11264, 187103, 2719602, 35688774, 432076735, 4902528769, 52736915601, 542569977315, 5375623914286, 51570049073953, 481136370463155, 4381314203869479, 39057034725462456, 341691760691655645

Offset: 1

Author

R. H. Hardin Mar 28 2013

Keywords

• nonn

Comments

Column 3 of A223892.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..51

Crossrefs

Cf. A223892.