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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A197109

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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 * A067490 A130036 A013735

Adjacent sequences:  A197101 A197102 A197103 * A197105 A197106 A197107

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2011

STATUS

approved

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Last modified May 14 12:18 EDT 2021. Contains 343882 sequences. (Running on oeis4.)