A268023 Number of nX4 0..2 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

78, 6084, 295962, 13530274, 528293442, 19177213020, 642612340592, 20358126145678, 612589053437088, 17674943525434667, 491314996740768425, 13223822255444331592, 345845237074776797318, 8816893125592668315273

Offset: 1

Author

R. H. Hardin, Jan 24 2016

Keywords

• nonn

Comments

Column 4 of A268026.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..168

Crossrefs

Cf. A268026.