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A185407 1/7 the number of nX4 0..6 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors 1
7, 1848, 279918, 53808534, 9560464068, 1755419411964, 318289797234978, 58009184105051760, 10550717546713596858, 1920558372882730002666, 349484670721711744198032, 63604421284059206327321532 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A185409

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for 3X4 with a(1,1)=0

..0..0..6..6....0..0..0..5....0..0..5..4....0..3..3..1....0..0..0..0

..3..1..1..1....0..2..3..5....4..3..5..4....0..3..0..1....3..3..3..2

..3..3..4..4....0..2..3..3....4..3..3..3....0..3..0..0....3..6..6..2

CROSSREFS

Sequence in context: A117661 A206459 A172937 * A332303 A145253 A248730

Adjacent sequences:  A185404 A185405 A185406 * A185408 A185409 A185410

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 26 2011

STATUS

approved

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Last modified April 12 18:58 EDT 2021. Contains 342932 sequences. (Running on oeis4.)