A264956 Number of 4 X n arrays containing n copies of 0..4-1 with no equal horizontal or vertical neighbors.

24, 504, 10728, 269352, 7340712, 212706840, 6427851432, 200437195992, 6401503898904, 208353728741064, 6885992401320264, 230473529137180056, 7796234052703001880, 266117752529540837544, 9154725401806039272072

Offset

1,1

Comments

Row 4 of A264954.

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

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

Crossrefs

Cf. A264954.

Sequence in context: A166757 A289833 A242524 * A055007 A014907 A233636

Adjacent sequences: A264953 A264954 A264955 * A264957 A264958 A264959

Keyword

nonn

Author

R. H. Hardin, Nov 29 2015

Status

approved