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A197438 Number of nX4 0..2 arrays with no element equal to the average of its horizontal and vertical neighbors 1
28, 1736, 98356, 5184780, 279785830, 15068331840, 811669674888, 43723066740718, 2355282493094894, 126874994917842426, 6834535322256736280, 368164567512212216530, 19832386906421976298012, 1068336297549353928162784 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A197442

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=5

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

..1..1..1..2....1..1..2..1....1..1..1..2....1..1..2..1....1..1..1..2

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

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

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

CROSSREFS

Sequence in context: A004705 A182400 A333125 * A263026 A294192 A202811

Adjacent sequences:  A197435 A197436 A197437 * A197439 A197440 A197441

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 15 2011

STATUS

approved

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Last modified June 24 00:05 EDT 2021. Contains 345403 sequences. (Running on oeis4.)