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A197336

Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,2,1,2 for x=0,1,2,3,4.

1, 2, 11, 167, 4005, 238206, 30771790, 8790242932, 5613820818788, 8031626024398536

OFFSET

1,2

COMMENTS

Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 2's

Diagonal of A197342

LINKS

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..0..0..0....0..0..0..1....2..2..2..2....0..1..3..1

..2..2..2..0....2..2..0..1....1..0..1..3....2..0..0..2....1..0..1..0

..2..0..2..0....2..2..1..3....3..1..1..1....2..2..0..2....3..1..2..2

..2..2..2..0....0..0..0..1....1..1..3..1....0..2..2..2....1..0..2..2

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 13 2011

STATUS

approved

URL: https://oeis.org/A197336