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A185537 1/6 the number of nX4 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors 1
6, 1155, 127570, 17526450, 2241330570, 295044602325, 38418831900875, 5024252800116630, 655951718326130130, 85695581922306489845, 11192649881286988768850, 1462013677990229903804335 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A185540
LINKS
EXAMPLE
Some solutions for 3X4 with a(1,1)=0
..0..5..5..4....0..2..5..5....0..0..2..4....0..1..2..2....0..0..0..2
..0..1..5..4....0..2..3..5....1..3..2..4....0..1..0..4....3..2..2..2
..1..1..3..3....2..2..3..3....1..3..4..4....5..5..0..4....3..5..5..5
CROSSREFS
Sequence in context: A190351 A267071 A219165 * A113159 A159717 A160857
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 30 2011
STATUS
approved

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Last modified February 22 18:10 EST 2024. Contains 370260 sequences. (Running on oeis4.)