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A197343 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,1,1,0 for x=0,1,2,3,4 0
1, 1, 18, 441, 17577, 2036994, 617973077, 434261782615, 734428231903592 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

Diagonal of A197350

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions containing all values 0 to 4 for n=4

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

..0..0..1..3....0..0..4..0....0..0..1..2....0..4..0..0....3..1..0..0

..0..4..0..1....2..1..0..0....0..4..0..0....0..0..1..2....1..0..4..0

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

CROSSREFS

Sequence in context: A172135 A005477 A326368 * A289941 A254211 A086501

Adjacent sequences:  A197340 A197341 A197342 * A197344 A197345 A197346

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 13 2011

STATUS

approved

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Last modified September 28 11:24 EDT 2020. Contains 337393 sequences. (Running on oeis4.)