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A197104
Half the number of nX3 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors
1
16, 1015, 50831, 2548972, 127561432, 6385146382, 319626874708, 15999836095846, 800916441358294, 40092114594159126, 2006923132890272745, 100462160201819897870, 5028914884473383292290, 251736423646820731452182
OFFSET
1,1
COMMENTS
Column 3 of A197109
LINKS
EXAMPLE
Some solutions for 4X4
..1..0..0....1..0..0....0..0..0....1..0..0....1..0..0....1..0..0....1..0..0
..0..2..2....1..2..2....3..2..1....0..2..3....0..0..3....0..0..3....1..1..3
..3..3..3....3..1..3....0..1..3....2..2..2....2..1..1....1..0..2....0..2..0
..2..3..1....0..2..0....2..2..1....2..3..3....0..2..3....0..2..0....3..0..2
CROSSREFS
Sequence in context: A160012 A070307 A159683 * A358051 A067490 A130036
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved