A265452 Number of nX2 0..n+2-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

2, 18, 250, 3358, 42282, 502154, 5710302, 62782966, 672520310, 7056533978, 72819524370, 741279145398, 7460955607878, 74381377429158, 735539563061590, 7222916531541006, 70499118369836786, 684459097597365542

Offset

1,1

Comments

Column 2 of A265458.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..2....3..1....1..0....4..3....3..2....2..3....2..0....1..3....4..2....3..2
..2..3....4..2....0..2....2..1....2..1....3..4....0..1....2..4....3..1....1..0
..1..2....2..1....2..3....1..3....1..2....4..2....1..2....1..2....1..3....0..1
..3..4....1..3....3..1....0..1....3..4....2..1....2..3....2..1....3..1....2..3

Crossrefs

Cf. A265458.

Sequence in context: A168562 A117514 A138437 * A379253 A121429 A368466

Adjacent sequences: A265449 A265450 A265451 * A265453 A265454 A265455

Keyword

nonn

Author

R. H. Hardin, Dec 09 2015

Status

approved