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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
OFFSET
1,1
COMMENTS
Column 4 of A197442
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 15 2011
STATUS
approved