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A222914 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
0, 18, 160, 2952, 17518, 356398, 2118905, 44960137, 272872198, 5911110630, 36457959703, 799084046960, 4981910445036, 110019357014516, 690925392478349, 15339905237756384, 96831631047966404, 2158535060733668360 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222918

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..169

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A300078 A119004 A002698 * A171642 A158808 A271899

Adjacent sequences:  A222911 A222912 A222913 * A222915 A222916 A222917

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 09 2013

STATUS

approved

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Last modified September 24 01:21 EDT 2020. Contains 337315 sequences. (Running on oeis4.)