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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
OFFSET
1,1
COMMENTS
Column 7 of A197109
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved