A267978 Number of 4Xn 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

222, 49284, 10941048, 2208460532, 422888259007, 77239556027716, 13568675256814069, 2305686585583566677, 380719989364128125411, 61309427889879303297626, 9657019976002416918553516

Offset

1,1

Comments

Row 4 of A267974.

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

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

Crossrefs

Cf. A267974.

Sequence in context: A268024 A267931 A268017 * A234623 A252956 A163653

Adjacent sequences: A267975 A267976 A267977 * A267979 A267980 A267981

Keyword

nonn

Author

R. H. Hardin, Jan 23 2016

Status

approved