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A265452 Number of nX2 0..n+2-2 arrays with each element differing from its horizontal and vertical neighbors by one or two. 1
2, 18, 250, 3358, 42282, 502154, 5710302, 62782966, 672520310, 7056533978, 72819524370, 741279145398, 7460955607878, 74381377429158, 735539563061590, 7222916531541006, 70499118369836786, 684459097597365542 (list; graph; refs; listen; history; text; internal format)
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 * A121429 A337775 A276364

Adjacent sequences:  A265449 A265450 A265451 * A265453 A265454 A265455

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 09 2015

STATUS

approved

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Last modified September 19 09:35 EDT 2021. Contains 347556 sequences. (Running on oeis4.)