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A197108 Half the number of nX7 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors 0
2661, 32393085, 319626874708, 3164557733113615, 31390101087203449414 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A197109

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A217440 A235733 A235514 * A224685 A167191 A002482

Adjacent sequences:  A197105 A197106 A197107 * A197109 A197110 A197111

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2011

STATUS

approved

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Last modified May 28 22:08 EDT 2022. Contains 354122 sequences. (Running on oeis4.)